Nucleic acids encoding receptor recognition factors and methods of use thereof

ABSTRACT

Receptor recognition factors exist that recognizes the specific cell receptor to which a specific ligand has been bound, and that may thereby signal and/or initiate the binding of the transcription factor to the DNA site. The receptor recognition factor is in one instance, a part of a transcription factor, and also may interact with other transcription factors to cause them to activate and travel to the nucleus for DNA binding. The receptor recognition factor appears to be second-messenger-independent in its activity, as overt perturbations in second messenger concentrations are of no effect. The concept of the invention is illustrated by the results of studies conducted with interferon (IFN)-stimulated gene transcription, and particularly, the activation caused by both IFNα and IFNγ. Specific DNA and amino acid sequences for various human and murine receptor recognition factors are provided, as are polypeptide fragments of two of the ISGF-3 genes, and antibodies have also been prepared and tested. The polypeptides confirm direct involvement of tyrosine kinase in intracellular message transmission. Numerous diagnostic and therapeutic materials and utilities are also disclosed.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present Application is a Division of U.S. Ser. No. 08/820,754, filedMar. 19, 1997, which is a Division of U.S. Ser. No. 08/212,185, filedMar. 11, 1994 which is a Continuation-In-Part of U.S. Ser. No.08/126,588 now abandoned and U.S. Ser. No. 08/126,595 now abandoned,both filed Sep. 24, 1993, which are both Continuations-In-Part of U.S.Ser. No. 07/980,498, filed Nov. 23, 1992, now abandoned, which is aContinuation-In-Part of U.S. Ser. No. 07/854,296, filed Mar. 19, 1992,now abandoned, the disclosures of which are hereby incorporated byreference in their entireties. Applicants claim the benefits of theseApplications under 35 U.S.C. § 120.

RELATED PUBLICATIONS

The Applicants are authors or co-authors of several articles directed tothe subject matter of the present invention. (1) Darnell et al.,"Interferon-Dependent Transcriptional Activation: Signal TransductionWithout Second Messenger Involvement?" THE NEW BIOLOGIST, 2(10):1-4,(1990); (2) X. Fu et al., "ISGF3, The Transcriptional Activator Inducedby Interferon α, Consists of Multiple Interacting Polypeptide Chains"PROC. NATL. ACAD. SCI. USA, 87:8555-8559 (1990); (3) D. S. Kessler etal., "IFNα Regulates Nuclear Translocation and DNA-Binding Affinity ofISGF3, A Multimeric Transcriptional Activator" GENES AND DEVELOPMENT,4:1753 (1990). All of the above listed articles are incorporated hereinby reference.

TECHNICAL FIELD OF THE INVENTION

The present invention relates generally to intracellular receptorrecognition proteins or factors (i.e. groups of proteins), and tomethods and compositions including such factors or the antibodiesreactive toward them, or analogs thereof in assays and for diagnosing,preventing and/or treating cellular debilitation, derangement ordysfunction. More particularly, the present invention relates toparticular IFN-dependent receptor recognition molecules that have beenidentified and sequenced, and that demonstrate direct participation inintracellular events, extending from interaction with the ligandedreceptor at the cell surface to transcription in the nucleus, and toantibodies or to other entities specific thereto that may therebyselectively modulate such activity in mammalian cells.

BACKGROUND OF THE INVENTION

There are several possible pathways of signal transduction that might befollowed after a polypeptide ligand binds to its cognate cell surfacereceptor. Within minutes of such ligand-receptor interaction, genes thatwere previously quiescent are rapidly transcribed (Murdoch et al., 1982;Larner et al., 1984; Friedman et al., 1984; Greenberg and Ziff, 1984;Greenberg et al., 1985). One of the most physiologically important, yetpoorly understood, aspects of these immediate transcriptional responsesis their specificity: the set of genes activated, for example, byplatelet-derived growth factor (PDGF), does not completely overlap withthe one activated by nerve growth factor (NGF) or tumor necrosis factor(CNF) (Cochran et al., 1983; Greenberg et al., 1985; Almendral et al.,1988; Lee et al., 1990). The interferons (IFN) activate sets of othergenes entirely. Even IFNα and IFNγ, whose presence results in theslowing of cell growth and in an increased resistance to viruses (Tammet al., 1987) do not activate exactly the same set of genes Larner etal., 1984; Friedman et al., 1984; Celis et al., 1987, 1985; Larner etal., 1986).

The current hypotheses related to signal transduction pathways in thecytoplasm do not adequately explain the high degree of specificityobserved in polypeptide-dependent transcriptional responses. The mostcommonly discussed pathways of signal transduction that might ultimatelylead to the nucleus depend on properties of cell surface receptorscontaining tyrosine kinase domains [for example, PDGF, epidermal growthfactor (EGF), colony-stimulating factor (CSF), insulin-like growthfactor-1 (IGF-1); see Gill, 1990; Hunter, 1990) or of receptors thatinteract with G-proteins (Gilman, 1987). These two groups of receptorsmediate changes in the intracellular concentrations of second messengersthat, in turn, activate one of a series of protein phosphokinases,resulting in a cascade of phosphorylations (or dephosphorylations) ofcytoplasmic proteins.

It has been widely conjectured that the cascade of phosphorylationssecondary to changes in intracellular second messenger levels isresponsible for variations in the rates of transcription of particulargenes (Bourne, 1988, 1990; Berridge, 1987; Gill, 1990; Hunter, 1990).However, there are at least two reasons to question the suggestion thatglobal changes in second messengers participate in the chain of eventsleading to specific transcriptional responses dependent on specificreceptor occupation by polypeptide ligands.

First, there is a limited number of second messengers (cAMP, diacylglycerol, phosphoinositides, and Ca²⁺ are the most prominentlydiscussed), whereas the number of known cell surface receptor-ligandpairs of only the tyrosine kinase and G-protein varieties, for example,already greatly outnumbers the list of second messengers, and couldeasily stretch into the hundreds (Gill, 1990; Hunter, 1990). Inaddition, since many different receptors can coexist on one cell type atany instant, a cell can be called upon to respond simultaneously to twoor more different ligands with an individually specific transcriptionalresponse each involving a different set of target genes. Second, anumber of receptors for polypeptide ligands are now known that haveneither tyrosine kinase domains nor any structure suggesting interactionwith G-proteins. These include the receptors for interleukin-2 (IL-2)(Leonard et al., 1985), IFNα (Uze et al., 1990), IFNγ (Aguet et al.,1988), NGF (Johnson et al., 1986), and growth hormone (Leung et al.,1987). The binding of each of these receptors to its specific ligand hasbeen demonstrated to stimulate transcription of a specific set of genes.For these reasons it seems unlikely that global intracellularfluctuations in a limited set of second messengers are integral to thepathway of specific, polypeptide ligand-dependent, immediatetranscriptional responses.

In PCT International Publication No. WO 92108740 published May 29, 1992by the applicant herein, the above analysis was presented and it wasdiscovered and proposed that a receptor recognition factor or factors,served in some capacity as a type of direct messenger between ligandedreceptors at the cell surface and the cell nucleus. One of thecharacteristics that was ascribed to the receptor recognition factor wasits apparent lack of requirement for changes in second messengerconcentrations. Continued investigation of the receptor recognitionfactor through study of the actions of the interferons IFNα and IFNγ hasfurther elucidated the characteristics and structure of theinterferon-related factor ISGF-3, and more broadly, the characterizationand structure of the receptor recognition factor in a manner thatextends beyond earlier discoveries previously described. It isaccordingly to the presentation of this updated characterization of thereceptor recognition factor and the materials and methods bothdiagnostic and therapeutic corresponding thereto that the presentdisclosure is directed.

SUMMARY OF THE INVENTION

In accordance with the present invention, receptor recognition factorshave been further characterized that appear to interact directly withreceptors that have been occupied by their ligand on cellular surfaces,and which in turn either become active transcription factors, oractivate or directly associate with transcription factors that enter thecells' nucleus and specifically binds on predetermined sites and therebyactivates the genes. It should be noted that the receptor recognitionproteins thus possess multiple properties, among them: 1) recognizingand being activated during such recognition by receptors; 2) beingtranslocated to the nucleus by an inhibitable process (eg. NaF inhibitstranslocation); and 3) combining with transcription activating proteinsor acting themselves as transcription activation proteins, and that allof these properties are possessed by the proteins described herein.

A further property of the receptor recognition factors (also termedherein signal transducers and activators of transcription--STAT) isdimerization to form homodimers or heterodimers upon activation byphosphorylation of tyrosine. In a specific embodiment, infra, Stat91 andStat84 form homodimers and a Stat91-Stat84 heterodimer. Accordingly, thepresent invention is directed to such dimers, which can formspontaneously by phophorylation of the STAT protein, or which can beprepared synthetically by chemically cross-lining two like or unlikeSTAT proteins.

The receptor recognition factor is proteinaceous in composition and isbelieved to be present in the cytoplasm. The recognition factor is notdemonstrably affected by concentrations of second messengers, howeverdoes exhibit direct interaction with tyrosine kinase domains, althoughit exhibits no apparent interaction with G-proteins. More particularly,as is shown in a co-pending, co-owned application entitled"INTERFERON-ASSOCIATED RECEPTOR RECOGNITION FACTORS, NUCLEIC ACIDSENCODING THE SAME AND METHODS OF USE THEREOF," filed on even dateherewith, the 91 kD human interferon (IFN)-γ factor, represented by SEQID NO:4 directly interacts with DNA after acquiring phosphate ontyrosine located at position 701 of the amino acid sequence.

The recognition factor is now known to comprise several proteinaceoussubstituents, in the instance of IFNα and IFNγ. Particularly, threeproteins derived from the factor ISGF-3 have been successfully sequencedand their sequences are set forth in FIG. 1 (SEQ ID NOS:1, 2), FIG. 2(SEQ ID NOS:3, 4) and FIG. 3 (SEQ. ID NOS.5, 6) herein. Additionally, amurine gene encoding the 91 kD protein (i.e., the murine homologue ofthe human protein having an amino acid sequence of SEQ ID NO:4) has beenidentified and sequenced. The nucleotide sequence (SEQ ID NO:7) anddeduced amino acid sequence (SEQ ID NO:8) are shown in FIGS. 13A-13C.

In a further embodiment, murine genes encoding homologs of therecognition factor have been succefully sequenced and cloned intoplasmids. A gene in plasmid 13sf1 has the nucleotide sequence (SEQ IDNO:9) and deduced amino acid sequence (SEQ ID NO:10) as shown in FIGS.14A-14C. A gene in plasmid 19sf6 has the nucleotide sequence (SEQ IDNO:11) and deduced amino acid sequence (SEQ ID NO: 12) shown in FIGS.15A-15C.

It is particularly noteworthy that the protein sequence of FIG. 1 (SEQID NO:2) and the sequence of the proteins of FIGS. 2 (SEQ ID NO:4) and 3(SEQ ID NO:6) derive, respectively, from two different but relatedgenes. Moreover, the protein sequence of FIG. 13 (SEQ ID NO:8) derivesfrom a murine gene that is analogous to the gene encoding the protein ofFIG. 2 (SEQ ID NO:4). Of further note is that the protein sequences ofFIGS. 14 (SEQ ID NO:10) and 15 (SEQ ID NO:12) derive from two genes thatare different from, but related to, the protein of FIG. 13 (FIG IDNO:8). It is clear from these discoveries that a family of genes exists,and that further family members likewise exist. Accordingly, asdemonstrated herein, by use of hybridization techniques, additional suchfamily members will be found.

Further, the capacity of such family members to function in the mannerof the receptor recognition factors disclosed, herein may be assessed bydetermining those ligand that cause the phosphorylation of theparticular family members.

In its broadest aspect, the present invention extends to a receptorrecognition factor implicated in the transcriptional stimulation ofgenes in target cells in response to the binding of a specificpolypeptide ligand to its cellular receptor on said target cell, saidreceptor recognition factor having the following characteristics:

a) apparent direct interaction with the ligand-bound receptor complexand activation of one or more transcription factors capable of bindingwith a specific gene;

b) an activity demonstrably unaffected by the presence or concentrationof second messengers;

c) direct interaction with tyrosine kinase domains; and

d) a perceived absence of interaction with G-proteins.

In a further aspect, the receptor recognition (STAT) protein forms adimer upon activation by phosphorylation.

In a specific example, the receptor recognition factor represented bySEQ ID NO:4 possesses the added capability of acting as a transcriptionfactor and, in particular, as a DNA binding protein in response tointerferon-γ stimulation. This discovery presages an expanded role forthe proteins in question, and other proteins and like factors that haveheretofore been characterized as receptor recognition factors. It istherefore apparent that a single factor may indeed provide the nexusbetween the liganded receptor at the cell surface and directparticipation in DNA transcriptional activity in the nucleus. Thispleiotypic factor has the following characteristics:

a) It interacts with an interferon-γ-bound receptor kinase complex;

b) It is a tyrosine kinase substrate; and

c) When phosphorylated, it serves as a DNA binding protein.

More particularly, the factor represented by SEQ ID NO:4 isinterferon-dependent in its activity and is responsive to interferonstimulation, particularly that of interferon-γ. It has further beendiscovered that activation of the factor represented by SEQ ID NO:4requires phosphorylation of tyrosine-701 of the protein, and furtherstill that tyrosine phosphorylation requires the presence of afunctionally active SH2 domain in the protein. Preferably, such SH2domain contains an amino acid residue corresponding to an arginine atposition 602 of the protein.

In a still further aspect, the present invention extends to a receptorrecognition factor interactive with a liganded interferon receptor,which receptor recognition factor possesses the followingcharacteristics:

a) it is present in cytoplasm;

b) it undergoes tyrosine phosphorylation upon treatment of cells withIFNα or IFNγ;

c) it activates transcription of an interferon stimulated gene;

d) it stimulates either an ISRE-dependent or a gamma activated site(GAS)-dependent transcription in vivo;

e) it interacts with IFN cellular receptors, and

f) it undergoes nuclear translocation upon stimulation of the IFNcellular receptors with IFN.

The factor of the invention represented by SEQ ID NO:4 appears to act insimilar fashion to an earlier determined site-specific DNA bindingprotein that is interferon-γ dependent and that has been earlier calledthe γ activating factor (GAF). Specifically, interferon-γ-dependentactivation of this factor occurs without new protein synthesis andappears within minutes of interferon-γ treatment, achieves maximumextent between 15 and 30 minutes thereafter, and then disappears after2-3 hours. These further characteristics of identification and actionassist in the evaluation of the present factor for applications havingboth diagnostic and therapeutic significance.

In a particular embodiment, the present invention relates to all membersof the herein disclosed family of receptor recognition factors exceptthe 91 kD protein factors, specifically the proteins whose sequences arerepresented by one or more of SEQ ID NO:4, SEQ ID NO:6 or SEQ ID NO:8.

The present invention also relates to a recombinant DNA molecule orcloned gene, or a degenerate variant thereof, which encodes a receptorrecognition factor, or a fragment thereof, that possesses a molecularweight of about 113 kD and an amino acid sequence set forth in FIG. 1(SEQ ID NO:2); preferably a nucleic acid molecule, in particular arecombinant DNA molecule or cloned gene, encoding the 113 kD receptorrecognition factor has a nucleotide sequence or is complementary to aDNA sequence shown in FIG. 1 (SEQ ID NO:1). In another embodiment, thereceptor recognition factor has a molecular weight of about 91 kD andthe amino acid sequence set forth in FIG. 2 (SEQ ID NO:4) or FIG. 13(SEQ ID NO:8); preferably a nucleic acid molecule, in particular arecombinant DNA molecule or cloned gene, encoding the 91 kD receptorrecognition factor has a nucleotide sequence or is complementary to aDNA sequence shown in FIG. 2 (SEQ ID NO:3) or FIG. 13 (SEQ ID NO:8). Inyet a further embodiment, the receptor recognition factor has amolecular weight of about 84 kD and the amino acid sequence set forth inFIG. 3 (SEQ ID NO:6); preferably a nucleic acid molecule, in particulara recombinant DNA molecule or cloned gene, encoding the 84 kD receptorrecognition factor has a nucleotide sequence or is complementary to aDNA sequence shown in FIG. 3 (SEQ ID NO:5). In yet another embodiment,the receptor recognition factor has an amino acid sequence set forth inFIG. 14 (SEQ ID NO:10); preferably a nucleic acid molecule, inparticular a recombinant DNA molecule or cloned gene, encoding suchreceptor recognition factor has a nucleotide sequence or iscomplementary to a DNA sequence shown in FIG. 14 (SEQ ID NO:9). In stillanother embodiment, the receptor recognition factor has an amino acidsequence set forth in FIG. 15 (SEQ ID NO:12); preferably a nucleic acidmolecule, in particular a recombinant DNA molecule or cloned gene,encoding such receptor recognition factor has a nucleotide sequence oris complementary to a DNA sequence shown in FIG. 15 (SEQ ID NO:11).

The human and murine DNA sequences of the receptor recognition factorsof the present invention or portions thereof, may be prepared as probesto screen for complementary sequences and genomic clones in the same oralternate species. The present invention extends to probes so preparedthat may be provided for screening cDNA and genomic libraries for thereceptor recognition factors. For example, the probes may be preparedwith a variety of known vectors, such as the phage λ vector. The presentinvention also includes the preparation of plasmids including suchvectors, and the use of the DNA sequences to construct vectorsexpressing antisense RNA or ribozymes which would attack the mRNAs ofany or all of the DNA sequences set forth in FIGS. 1, 2, 3, 13, 14 and15 (SEQ ID NOS:1, 3, 5, 7, 9, and 11, respectively). Correspondingly,the preparation of antisense RNA and ribozymes are included herein.

The present invention also includes receptor recognition factor proteinshaving the activities noted herein, and that display the amino acidsequences set forth and described above and selected from SEQ ID NO:2,SEQ ID NO:4, SEQ ID NO:6, SEQ ID NO:8, SEQ ID NO:10 and SEQ ID NO:12.

In a further embodiment of the invention, the full DNA sequence of therecombinant DNA molecule or cloned gene so determined may be operativelylinked to an expression control sequence which may be introduced into anappropriate host. The invention accordingly extends to unicellular hoststransformed with the cloned gene or recombinant DNA molecule comprisinga DNA sequence encoding the present receptor recognition factor(s), andmore particularly, the complete DNA sequence determined from thesequences set forth above and in SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5,SEQ ID NO:7, SEQ ID NO:9 and SEQ ID NO:11.

According to other preferred features of certain preferred embodimentsof the present invention, a recombinant expression system is provided toproduce biologically active animal or human receptor recognition factor.

The concept of the receptor recognition factor contemplates thatspecific factors exist for correspondingly specific ligands, such astumor necrosis factor, nerve growth factor and the like, as describedearlier. Accordingly, the exact structure of each receptor recognitionfactor will understandably vary so as to achieve this ligand andactivity specificity. It is this specificity and the direct involvementof the receptor recognition factor in the chain of events leading togene activation, that offers the promise of a broad spectrum ofdiagnostic and therapeutic utilities.

The present invention naturally contemplates several means forpreparation of the recognition factor, including as illustrated hereinknown recombinant techniques, and the invention is accordingly intendedto cover such synthetic preparations within its scope. The isolation ofthe cDNA amino acid sequences disclosed herein facilitates thereproduction of the recognition factor by such recombinant techniques,and accordingly, the invention extends to expression vectors preparedfrom the disclosed DNA sequences for expression in host systems byrecombinant DNA techniques, and to the resulting transformed hosts.

The invention includes an assay system for screening of potential drugseffective to modulate transcriptional activity of target mammalian cellsby interrupting or potentiating the recognition factor or factors. Inone instance, the test drug could be administered to a cellular samplewith the ligand that activates the receptor recognition factor, or anextract containing the activated recognition factor, to determine itseffect upon the binding activity of the recognition factor to anychemical sample (including DNA), or to the test drug, by comparison witha control.

The assay system could more importantly be adapted to identify drugs orother entities that are capable of binding to the receptor recognitionand/or transcription factors or proteins, either in the cytoplasm or inthe nucleus, thereby inhibiting or potentiating transcriptionalactivity. Such assay would be useful in the development of drugs thatwould be specific against particular cellular activity, or that wouldpotentiate such activity, in time or in level of activity. For example,such drugs might be used to modulate cellular response to shock, or totreat other pathologies, as for example, in making IFN more potentagainst cancer.

In yet a further embodiment, the invention contemplates antagonists ofthe activity of a receptor recognition factor (STAT). In particular, anagent or molecule that inhibits dimerization (homodimerization orheterodimerization) can be used to block transcription activationeffected by an acitvated, phosphorylated STAT protein. In a specificembodiment, the antagonist can be a peptide having the sequence of aportion of an SH2 domain of a STAT protein, or the phophotyrosinedomaine of a STAT protein, or both. If the peptide contains bothregions, preferably the regions are located in tandem, more preferablywith the SH2 domain portion N-terminal to the phosphotyrosine portion.In a specific example, infra, such peptides are shown to be capable ofdisrupting dimerization of STAT proteins.

One of the characteristics of the present receptor recognition factorsis their participation in rapid phosphorylation and dephosphorylationduring the course of and as part of their activity. Significantly, suchphosphorylation takes place in an interferon-dependent manner and withina few minutes in the case of the ISGF-3 proteins identified herein, onthe tyrosine residues defined thereon. This is strong evidence that thereceptor recognition factors disclosed herein are the first truesubstrates whose intracellular function is well understood and whoseintracellular activity depends on tyrosine kinase phosphorylation. Inparticular, the addition of phosphate to the tyrosine of a transcriptionfactor is novel. This suggests further that tyrosine kinase takes directaction in the transmission of intracellular signals to the nucleus, anddoes not merely serve as a promoter or mediator of serine and/orserinine kinase activity, as has been theorized to date. Also, the roleof the factor represented by SEQ ID NO:2 in its activated phosphorylatedform suggests possible independent therapeutic use for this activatedform. Likewise, the role of the factor as a tyrosine kinase substratesuggests its interaction with kinase in other theatres apart from thecomplex observed herein.

The diagnostic utility of the present invention extends to the use ofthe present receptor recognition factors in assays to screen fortyrosine kinase inhibitors. Because the activity of the receptorrecognition-transcriptional activation proteins described herein mustmaintain tyrosine phosphorylation, they can and presumably aredephosphorylated by specific tyrosine phosphatases. Blocking of thespecific phosphatase is therefore an avenue of pharmacologicalintervention that would potentiate the activity of the receptorrecognition proteins.

The present invention likewise extends to the development of antibodiesagainst the receptor recognition factor(s), including naturally raisedand recombinantly prepared antibodies. For example, the antibodies couldbe used to screen expression libraries to obtain the gene or genes thatencode the receptor recognition factor(s). Such antibodies could includeboth polyclonal and monoclonal antibodies prepared by known genetictechniques, as well as bi-specific (chimeric) antibodies, and antibodiesincluding other functionalities suiting them for additional diagnosticuse conjunctive with their capability of modulating transcriptionalactivity.

In particular, antibodies against specifically phosphorylated factorscan be selected and are included within the scope of the presentinvention for their particular ability in following activated protein.Thus, activity of the recognition factors or of the specificpolypeptides believed to be causally connected thereto may therefore befollowed directly by the assay techniques discussed later on, throughthe use of an appropriately labeled quantity of the recognition factoror antibodies or analogs thereof.

Thus, the receptor recognition factors, their analogs and/or analogs,and any antagonists or antibodies that may be raised thereto, arecapable of use in connection with various diagnostic techniques,including immunoassays, such as a radioimmunoassay, using for example,an antibody to the receptor recognition factor that has been labeled byeither radioactive addition, reduction with sodium borohydride, orradioiodination.

In an immunoassay, a control quantity of the antagonists or antibodiesthereto, or the like may be prepared and labeled with an enzyme, aspecific binding partner and/or a radioactive element, and may then beintroduced into a cellular sample. After the labeled material or itsbinding partner(s) has had an opportunity to react with sites within thesample, the resulting mass may be examined by known techniques, whichmay vary with the nature of the label attached. For example, antibodiesagainst specifically phosphorylated factors may be selected andappropriately employed in the exemplary assay protocol, for the purposeof following activated protein as described above.

In the instance where a radioactive label, such as the isotopes ³ H, ¹⁴C, ³² P, ³⁵ S, ³⁶ Cl, ⁵¹ Cr, ⁵⁷ Co, ⁵⁸ Co, ⁵⁹ Fe, ⁹⁰ Y, ¹²⁵ I, ¹³¹ I,and ¹⁸⁶ Re are used, known currently available counting procedures maybe utilized. In the instance where the label is an enzyme, detection maybe accomplished by any of the presently utilized calorimetric,spectrophotometric, fluorospectrophotometric, amperometric or gasometrictechniques known in the art.

The present invention includes an assay system which may be prepared inthe form of a test kit for the quantitative analysis of the extent ofthe presence of the recognition factors, or to identify drugs or otheragents that may mimic or block their activity. The system or test kitmay comprise a labeled component prepared by one of the radioactiveand/or enzymatic techniques discussed herein, coupling a label to therecognition factors, their agonists and/or antagonists, and one or moreadditional immunochemical reagents, at least one of which is a free orimmobilized ligand, capable either of binding with the labeledcomponent, its binding partner, one of the components to be determinedor their binding partner(s).

In a further embodiment, the present invention relates to certaintherapeutic methods which would be based upon the activity of therecognition factor(s), its (or their) subunits, or active fragmentsthereof, or upon agents or other drugs determined to possess the sameactivity. A first therapeutic method is associated with the preventionof the manifestations of conditions causally related to or followingfrom the binding activity of the recognition factor or its subunits, andcomprises administering an agent capable of modulating the productionand/or activity of the recognition factor or subunits thereof, eitherindividually or in mixture with each other in an amount effective toprevent the development of those conditions in the host. For example,drugs or other binding partners to the receptorrecognition/transcription factors or proteins may be administered toinhibit or potentiate transcriptional activity, as in the potentiationof interferon in cancer therapy. Also, the blockade of the action ofspecific tyrosine phosphatases in the dephosphorylation of activated(phosphorylated) recognition/transcription factors or proteins presentsa method for potentiating the activity of the receptor recognitionfactor or protein that would concomitantly potentiate therapies based onreceptor recognition factor/protein activation.

More specifically, the therapeutic method generally referred to hereincould include the method for the treatment of various pathologies orother cellular dysfunctions and derangements by the administration ofpharmaceutical compositions that may comprise effective inhibitors orenhancers of activation of the recognition factor or its subunits, orother equally effective drugs developed for instance by a drug screeningassay prepared and used in accordance with a further aspect of thepresent invention. For example, drugs or other binding partners to thereceptor recognition/transcription factor or proteins, as represented bySEQ ID NO:2, may be administered to inhibit or potentiatetranscriptional activity, as in the potentiation of interferon in cancertherapy. Also, the blockade of the action of specific tyrosinephosphatases in the dephosphorylation of activated (phosphorylated)recognition/transcription factor or protein presents a method forpotentiating the activity of the receptor recognition factor or proteinthat would concomitantly potentiate therapies based on receptorrecognition factor/protein activation. Correspondingly, the inhibitionor blockade of the activation or binding of therecognition/transcription factor would affect MHC Class II expressionand consequently, would promote immunosuppression. Materials exhibitingthis activity, as illustrated later on herein by staurosporine, may beuseful in instances such as the treatment of autoimmune diseases andgraft rejection, where a degree of immunosuppression is desirable.

In particular, the proteins of ISGF-3 whose sequences are presented inSEQ ID NOS:2, 4, 6, 8, 10 or 12 herein, their antibodies, agonists,antagonists, or active fragments thereof, could be prepared inpharmaceutical formulations for administration in instances whereininterferon therapy is appropriate, such as to treat chronic viralhepatitis, hairy cell leukemia, and for use of interferon in adjuvanttherapy. The specificity of the receptor proteins hereof would make itpossible to better manage the aftereffects of current interferontherapy, and would thereby make it possible to apply interferon as ageneral antiviral agent.

Accordingly, it is a principal object of the present invention toprovide a receptor recognition factor and its subunits in purified formthat exhibits certain characteristics and activities associated withtranscriptional promotion of cellular activity.

It is a further object of the present invention to provide antibodies tothe receptor recognition factor and its subunits, and methods for theirpreparation, including recombinant means.

It is a further object of the present invention to provide a method fordetecting the presence of the receptor recognition factor and itssubunits in mammals in which invasive, spontaneous, or idiopathicpathological states are suspected to be present.

It is a further object of the present invention to provide a method andassociated assay system for screening substances such as drugs, agentsand the like, potentially effective in either mimicking the activity orcombating the adverse effects of the recognition factor and/or itssubunits in mammals.

It is a still further object of the present invention to provide amethod for the treatment of mammals to control the amount or activity ofthe recognition factor or subunits thereof, so as to alter the adverseconsequences of such presence or activity, or where beneficial, toenhance such activity.

It is a still further object of the present invention to provide amethod for the treatment of mammals to control the amount or activity ofthe recognition factor or its subunits, so as to treat or avert theadverse consequences of invasive, spontaneous or idiopathic pathologicalstates.

It is a still further object of the present invention to providepharmaceutical compositions for use in therapeutic methods whichcomprise or are based upon the recognition factor, its subunits, theirbinding partner(s), or upon agents or drugs that control the production,or that mimic or antagonize the activities of the recognition factors.

Other objects and advantages will become apparent to those skilled inthe art from a review of the ensuing description which proceeds withreference to the following illustrative drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1A-1E depicts the full receptor recognition factor nucleic acidsequence and the deduced amino acid sequence derived for the ISGF-3αgene defining the 113 kD protein. The nucleotides are numbered from 1 to2553 (SEQ ID NO:1), and the amino acids are numbered from 1 to 851 (SEQID NO:2).

FIGS. 2A-2D depicts the full receptor recognition factor nucleic acidsequence and the deduced amino acid sequence derived for the ISGF-3αgene defining the 91 kD protein. The nucleotides are numbered from 1 to3943 (SEQ ID NO:3), and the amino acids are numbered from 1 to 750 (SEQID NO:4).

FIGS. 3A-3C depicts the full receptor recognition factor nucleic acidsequence and the deduced amino acid sequence derived for the ISGF-3αgene defining the 84 kD protein. The nucleotides are numbered from 1 to2166 (SEQ ID NO:5), and the amino acids are numbered from 1 to 712 (SEQID NO:6).

FIG. 4 shows the purification of ISGF-3. The left-hand portion of theFigure shows the purification of ISGF-3 demonstrating the polypeptidespresent after the first oligonucleotide affinity column (lane 3) and twodifferent preparations after the final chromatography step (Lanes 1 and2). The left most lane contains protein size markers (High molecularweight, Sigma). ISGF-3 component proteins are indicated as 113 kD, 91kD, 84 kD, and 48 kD [Kessler et al., GENES & DEV., 4 (1990); Levy etal., THE EMBO. J., 9 (1990)]. The right-hand portion of the Figure showspurified ISGF-3 from 2-3×10¹¹ cells was electroblotted to nitrocelluloseafter preparations 1 and 2 (Lanes 1 and 2) had been pooled and separatedon a 7.5% SDS polyacrylamide gel. ISGF-3 component proteins areindicated. The two lanes on the right represent protein markers (Highmolecular weight, and prestained markers, Sigma).

FIGS. 5a-5b generally presents the results of Northern Blot analysis forthe 91/84 kD peptides. FIG. 5a presents restriction maps for cDNA clonesE4 (top map) and E3 (bottom map) showing DNA fragments that wereradiolabeled as probes (probes A-D). FIG. 5b comprises Northern blots ofcytoplasmic HeLa RNA hybridized with the indicated probes. The 4.4 and3.1 KB species as well as the 28S and 18S rRNA bands are indicated.

FIG. 6 depicts the conjoint protein sequence of the 91 kD (SEQ ID NO:4)and 84 kD (SEQ ID NO:6) proteins of ISGF-3. One letter amino acid codeis shown for the open reading frame from clone E4, (encoding the 91 kDprotein). The 84 kD protein, encoded by a different cDNA (E3), has theidentical sequence but terminates after amino acid 712, as indicated.Tryptic peptides t19, t13a, and t13b from the 91 kD protein areindicated. The sole recovered tryptic peptide from the 84 kD protein,peptide t27, was wholly contained within peptide t19 as indicated.

FIGS. 7a-7e presents the results of Western blot and antibody shiftanalyses.

a) Highly purified ISGF-3, fractionated on a 7.0% SDS polyacrylamidegel, was probed with antibodies a42 (amino acids 597-703); a55 (aminoacids 2-59); and a57 (amino acids 705-739) in a Western blot analysis.The silver stained part of the gel (lanes a, b, and c) illustrates thelocation of the ISGF-3 component proteins and the purity of the materialused in Western blot: Lane a) Silver stain of protein sample used in allthe Western blot experiments (immune and preimmune). Lane b) Material ofequal purity to that shown in FIG. 4, for clearer identification of theISGF-3 proteins. Lane c) Size protein markers indicated.

b) Antibody interference of the ISGF-3 shift complex; Lane a) Thecomplete ISGF-3 and the free ISGF-3γ component shift with partiallypurified ISGF-3 are marked; Lane b) Competition with a 100 fold excessof cold ISRE oligonucleotide. Lane c) Shift complex after the additionof 1 ml of preimmune serum to a 12.5 μl shift reaction. Lanes d ande)--Shift complex after the addition of 1 μl of a 1:10 dilution or 1 mlof undiluted a42 antiserum to a 12.5 μl shift reaction.

Methods

Antibodies a42, a55 and a57 were prepared by injecting approximately 500mgm of a fusion protein prepared in E. coli using the GE3-3X vector[Smith et al., GENE, 67 (1988)]. Rabbits were bled after the secondboost and serum prepared.

For Western blots highly purified ISGF-3 was separated on a 7% SDSpolyacrylamide gel and electroblotted to nitrocellulose. The filter wasincubated in blocking buffer ("blotto"), cut into strips and probed withspecific antiserum and preimmune antiserum diluted 1:500. The immunecomplexes were visualized with the aid of an ECL kit (Amersham). Shiftanalyses were performed as previously described [Levy et al., GENES &DEV., 2 (1988); Levy et al., GENES & DEV, 3 (1989)] in a 4.5%polyacrylanilde gel.

FIG. 8 presents the full length amino acid sequence of 113 kD proteincomponents of ISGF-3α (SEQ ID NO:2) and alignment of conserved aminoacid sequences between the 113 kD and 91/84 kD proteins (SEQ ID NOS:4AND 6).

A. Polypeptide sequences (A-E) derived from protein micro-sequencing ofpurified 113 kD protein (see accompanying paper) are underlined. Basedon peptide E, we designed a degenerate oligonucleotide,AAT/CACIGAA/GCCIATGGAA/GATT/CATT (SEQ ID NO:13), which was used toscreen a cDNA library [Pine et la., MOL. CELL. BIOL., 10 (1990)]basically as described [Norman et al., CELL, 55 (1988)]. Briefly, thedegenerate oligonucleotides were labeled by 32P-γ-ATP by polynucleotidekinase, hybridizations were carried out overnight at 40° C. in 6×SSTE(0.9 M NaCl, 60 mM Tris-HCl [pH 7.9] 6 mM EDTA), 0.1%SDS, 2 mM Na₂ P₅O₇, 6 mM KH₂ PO₄ in the presence of 100 mg/ml salmon sperm DNA sperm and10×Denhardt's solution [Maniatis et al., MOLECULAR CLONING; A LABORATORYMANUAL (Cold Spring Harbor Lab., 1982)]. The nitrocellulose filters thenwere washed 4×10 min. with the same hybridization conditions withoutlabeled probe and salmon sperm DNA. Autoradiography was carried out at-80° C. with intensifying screen for 48 hrs. A PCR product was obtainedlater by the same method described for the 91/84 kD sequences, by usingoligonucleotides designed according polypeptide D and E. The sequence ofthis PCR product was identical to a region in clone f11. The full lengthof 113 kD protein contains 851 amino acids. Three major helices in theN-terminal region were predicted by the methods of both Chou and Fasman[Chou et al., ANN. REV. BIOCHEM., 47 (1978)] and Garnier et al [Garnieret al., J. MOL. BIOL., 12 (1978)] and are shown in shadowed boxes. Atthe C-terminal end, a highly negative charged domain was found. Allnegative charged residues are blackened and positive charged residuesshadowed. The five polypeptides that derived from protein microscreening[Aebersold et al., PROC. NATL. ACD. SCI. USA, 87 (1987)] are underlined.

B) Comparison of amino acid sequences of 113 kD and 91/84 kD proteinshows a 42% identical amino acid residues in the overlapping 715 aminoacid sequence shown. In the middle helix region four leucine and onevaline heptad repeats were identified in both 113 and 91/84 kD protein(the last leucine in 91/84 kD is not exactly preserved as heptadrepeats). When a heligram structure was drawn this helix is amphipathic(not shown). Another notable feature of this comparison is severaltyrosine residues that are conserved in both proteins near their ends.

FIG. 9 shows the in vitro transcription and translation of 113 kD and 91kD cDNA and a Northern blot analysis with 113 kD cDNA probe.

a) The full length cDNA clones of 113 and 91 kD protein were transcribedin vitro and transcribed RNAs was translated in vitro with rabbitlenticulate lysate (Promega; conditions as described in the Promegaprotocol). The mRNA of BMV (Promega) was simultaneously translated as aprotein size marker. The 113 cDNA yielded a translated product about 105kD and the 91 cDNA yielded a 86 kD product.

b) When total cytoplasmic mRNAs isolated from superinduced HeLa cellswere utilized, a single 4.8 KB mRNA band was observed with a cDNA probecoding for C-end of 113 kD protein in a Northern blot analysis [Nielschet al., The EMBO. J., 10 (1991)].

FIG. 10(A) presents the results of Western blot analysis confirming theidentity of the 113 kD protein. An antiserum raised against apolypeptide segment [Harlow et al., ANTIBODIES; A LABORATORY MANUAL(Cold Spring Harbor Lab., 1988)] from amino acid 500 to 650 of 113 kDprotein recognized specifically a 113 kD protein in a protein Westernblot analysis. The antiserum recognized a band both in a highly purifiedISGF-3 fraction (>10,000 fold) from DNA affinity chromatography and inthe crude extracts prepared from γ and α IFN treated HeLa cells [Fu etal., PROC. NATL. ACAD. SCI. USA, 87 (1990)]. The antiserum was raisedagainst a fusion protein [a cDNA fragment coding for part of 113 kDprotein was inserted into pGEX-2T, a high expression vector in the E.coli [Smith et al., PROC. NATL. ACAD. SCI. USA, 83 (1986)] purified fromE. coli [Smith et al., GENE, 67 (1988)]. The female NZW rabbits wereimmunized with 1 mg fusion protein in Freund's adjuvant. Two subsequentboosts two weeks apart were carried out with 500 mg fusion protein. TheWestern blot was carried out with conditions described previously [Pineet al., MOL. CELL. BIOL., 10 (1990)].

FIG. 10(B) presents the results of a mobility shift assay showing thatthe anti-113 antiserum affects the ISGF-3 shift complex. Preimmune serumor the 113 kD antiserum was added to shift reaction carried out asdescribed [Fu et al. PROC. NATL. ACAD. SCI. USA, 87 (1990); Kessler etal. GENES & DEV., 4, (1990)] at room temperature for 20 min. thenone-third of reaction material was loaded onto a 5% polyacrylamide gel.In addition unlabeled probe was included in one reaction to showspecificity of the gel shift complexes.

FIG. 11 shows the results of experiments investigating the IFN-αdependent phosphorylation of 113, 91 and 84 kD proteins. Protein samplesfrom cells treated in various ways after 60 min. exposure to ³² PO₄ ⁻³were precipitated with antiserum to 113 kD protein. Lane 1 no treatmentof cells; Lane 2, cells treated 7 min. with IFN-α. By comparison withthe marker proteins labeled 200, 97.5, 69 and 46 kD (kilo daltons), thePO₄ ⁻³ labeled proteins in the precipitate are seen to be 113 and 91 kD.Lane 3, cells treated with IFN-γ overnight (no phosphorylated proteins)and then (Lane 4) treated with IFN-α for 7 min. show heavierphosphorylation of 113, 91 and 84 kD.

FIG. 12 is a chromatogram depicting the identification of phosphoaminoacid. Phosphate labeled protein of 113, 91 or 84 kD size was hydrolyzedand chromatographed to reveal newly labeled phosphotyrosine. Cellsuntreated with IFN showed only phosphoserine label. (PSer=phosphoserine; P Thr=phosphothreonine; P Tyr=phosphotyrosine.

FIG. 13 depicts (A) the deduced amino acid sequence (SEQ ID NO:8) of and(B-C) the DNA sequence (SEQ ID NO:7) encoding the murine 91 kDintracellular receptor recognition factor.

FIG. 14 depicts (A) the deduced amino acid sequence (SEQ ID NO:10) ofand (B-D) the DNA sequence (SEQ ID NO:9) encoding the 13sf1intracellular receptor recognition factor.

FIG. 15 depicts (A) the deduced amino acid sequence (SEQ ID NO:12) ofand (B-E) the DNA sequence (SEQ ID NO: 11) encoding the 19sf6intracellular receptor recognition factor.

FIG. 16. Determination of molecular weights of Stat91 and phospho Stat91by native gel analysis.

A) Western blot analysis of fractions from affinity purification.Extracts from human FS2 fibroblasts treated with IFN-γ (Ext), theunbound fraction (Flow), the fraction washed with Buffer AO.2 (AO.2),and the bound fraction eluted with buffer AO.8(AO.8) were immunoblottedwith anti-91T.

B) Native gel analysis. Phosphorylated Stat91 (the AO.8 fraction from A)and unphosphorylated Stat91 (the Flow fraction from A) were analyzed on4.5%, 5.5%, 6.5% and 7.5% native polyacrylamide gels followed byimmunoblotting with anti-91T. The top of gels (TOP) and the migrationposition of bromophenol blue (BPB) are indicated.

C) Ferguson plots. The relative mobilities (Rm) of the Stat91 andphospho Stat91 were obtained from FIG. 1B (see Experimental Procedures).Closed circle: Chicken egg albumin (45 kD); Cross: Bovine serum albumin,monomer (66 kD); Open square: Bovine serum albumin, dimer (132 kD); Opencircle: Urease, trimer (272 kD); Open triangle: Unphosphorylated Stat91;Closed triangle: phosphorylated Stat91.

D) Determination of molecular weights from the standard curve. Themolecular weights of phosphorylated and unphosphorylated Stat91 proteins(indicated as closed and open arrows, respectively) were obtained byextrapolation of their retardation coefficients.

FIG. 17. Determination of molecular weights by glycerol gradients.

A) Western blot analysis. Extracts from human Bud8 fibroblasts treatedwith IFN-γ (the rightmost lane) and every other fraction from fraction16 to 34 were analyzed on 7.5% SDS-PAGE followed by immunobloting withanti-91T. The peak of phosphorylated Stat91 (fraction 20) and the peakof unphosphorylated Stat91 (fraction 30) were indicated by a closed andopen arrow, respectively.

B) Mobility shift analysis. Every other fractions from the gradientswere analyzed.

C) Graphic representation of the data from A and B. Peak fractionnumbers of protein standards are plotted versus their molecular weight.The position of peaks (of phosphorylated and unphosphorylatedStat91protein are indicated by the closed and open arrows, respectively.Standards are ferritin (Fer, 440 kD), catalase (Cat, 232 kD), ferritinhalf unit (Fer 1/2, 220 kD), aldolase (Ald, 158 kD), bovine serumalbumin (BSA, 68 kD).

FIG. 18. Stat91in cell extracts binds DNA as a dimer.

A) Wester blot analysis. Extracts from stable cell lines expressingeither Stat84 (C84), or Stat91L (C91L) or both (Cmx) were analyzed on7.5% SDS-PAGE followed by immunobloting with anti-91.

B) Gel mobility shift analysis. Extracts from stable cell lines (FIG.3A) untreated (-) or treated with IFNγ (+) were analyzed. The positionsof Stat91 homodimer (91L), Stat84 homodimer (84), and the heterodimer(84*91) are indicated.

FIG. 19. Formation of herterodimer by denaturation and renaturation.Cytoplasmic (Left Panel) or nuclear extracts (Right Panel) fromIFN-γ-treated cell lines expressing either Stat84 (C84) or Stat91 (C91)were analyzed by gel mobility shift assays. +: with addition; -: withoutaddition; D/R: samples were subjected to guanidinium hydrochloridedenaturation and renaturation treatment.

FIG. 20. Diagramatic representation of dissociation and reassociationanalysis.

FIG. 21. Dissociation-reassociation analysis with peptides. Gel mobilityshift analysis with IFN-γ treated nuclear extracts from cell linesexpressing Stat91L (C91L, lane 15) or Stat84 (C84, lane 14) or mixtureof both (lane 1-13, 16-18) in the presence of increasing concentrationsof various peptides. 91-Y, unphosphorylated peptide from Stat91(LDGPKGTGYIKTELI) (SEQ. ID NO.:18); 91Y-p, phosphotyrosyl peptide fromStat91 (GY*IKTE) (SEQ ID NO.:19); 113Y-p, phosphotyrosyl peptide withhigh binding affinity to Src SH2 domain (EPQY*EEIPIYL, Songyang et al.,1993, Cell 72:767-778) (SEQ. ID NO.:21). Final concentrations ofpeptides added: 1 μM (lane 8), 4 μM (lane 2, 5, 11), 10 μM (lane 9), 40μM (lane 3, 6, 10, 12, 14-18), 160 μM (lane 4, 7, 13). +: with addition;-: without addition. Right panel: antiserum tests for identity ofgel-shift bands (see FIG. 3).

FIG. 22. Dissociation-reassociation analysis with GST fusion proteins.A) SDS-PAGE (12%) analysis of purified GST fusion proteins as visualizedby Commasie blue. GST-91 SH3, native SH2 domain of Stat91; GST-91 mSH2,R⁶⁰² to L⁶⁰² mutant; GST-91 SH3, SH3 domain of Stat91; GST Src SH2, theSH2 domain of src protein. Same amounts (1 μg) of each fusion proteinswere loaded. Protein markers were run in lane 1 as indicated.

B) Dissociation-reassociation analysis similar to FIG. 6. Dissociatingagents were GST fusion proteins purified from bacterial expression asshown above. Final concentrations of fusion proteins added are 0.5 μM(lanes 2, 5, 8, 11, 14), 2.5 μM (lanes 3, 6, 9, 12, 15) and 5 μM (lanes4, 7, 10, 13, 17, 18). +: with addition; -: without addition; FP: fusionproteins.

FIG. 23. Comparison of Stat91 SH2 structure with known SH2 structures.The Stat91 sequence is disclosed herein (SEQ ID NO:4). The structuresused for the other SH2s are Src (Waksman et al., 1992, Nature358:646-653) (SEQ ID NO:22), AbI (Overduin et al., 1992, Proc. Natl.Acad. Sci. USA 89:11673-77 and 1992, Cell 70:697-704) (SEQ ID NO:23, Lck(Eck et al., 1993, Nature 362:87-91) (SEQ ID NO:24), and p85αN (Bookeret al., 1992, Nature 358:684-687) (SEQ ID NO:25). The alignment of thedetermined structures is by direct coordinate superimposition of thebackbone structures. The names of secondary structural features andsignificant residues is based on the scheme of Eck et al., 1993. Theboundaries and extents of the structure features are indicated by[ - - - ]. The starting numbers for the parent sequences are shown inparentheses. Experimentally determined structurally conserved regionsare from Src, p85α, and AbI (Cowbum, unpublished). The root mean squaredeviation of three-dimensionally aligned structures differs by less than1 Angstrom for the backbone non-hydrogen atoms in the sections marked bythe XXX.

DETAILED DESCRIPTION

In accordance with the present invention there may be employedconventional molecular biology, microbiology, and recombinant DNAtechniques within the skill of the art. Such techniques are explainedfully in the literature. See, e.g., Maniatis, Fritsch & Sambrook,"Molecular Cloning: A Laboratory Manual" (1982); "DNA Cloning: APractical Approach," Volumes I and II (D. N. Glover ed. 1985);"Oligonucleotide Synthesis" (M. J. Gait ed. 1984); "Nucleic AcidHybridization" [B. D. Hames & S. J. Higgins eds. (1985)]; "TranscriptionAnd Translation" [B. D. Hames & S. J. Higgins, eds. (1984)]; "AnimalCell Culture" [R. I. Freshney, ed. (1986)]; "Immobilized Cells AndEnzymes" [IRL Press, (1986)]; B. Perbal, "A Practical Guide To MolecularCloning" (1984).

Therefore, if appearing herein, the following terms shall have thedefinitions set out below.

The terms "receptor recognition factor", "receptor recognition-tyrosinekinase factor", "receptor recognition factor/tyrosine kinase substrate","receptor recognition/transcription factor", "recognition factor" and"recognition factor protein(s)" and any variants not specificallylisted, may be used herein interchangeably, and as used throughout thepresent application and claims refer to proteinaceous material includingsingle or multiple proteins, and extends to those proteins having theamino acid sequence data described herein and presented in FIG. 1 (SEQID NO:2), FIG. 2 (SEQ ID NO:4) and in FIG. 3 (SEQ ID NO:6), and theprofile of activities set forth herein and in the Claims. Accordingly,proteins displaying substantially equivalent or altered activity arelikewise contemplated. These modifications may be deliberate, forexample, such as modifications obtained through site-directedmutagenesis, or may be accidental, such as those obtained throughmutations in hosts that are producers of the complex or its namedsubunits. Also, the terms "receptor recognition factor", "recognitionfactor" and "recognition factor protein(s)" are intended to includewithin their scope proteins specifically recited herein as well as allsubstantially homologous analogs and allelic variations.

The amino acid residues described herein are preferred to be in the "L"isomeric form. However, residues in the "D" isomeric form can besubstituted for any L-amino acid residue, as long as the desiredfunctional property of immunoglobulin-binding is retained by thepolypeptide. NH2 refers to the free amino group present at the aminoterminus of a polypeptide. COOH refers to the free carboxy group presentat the carboxy terminus of a polypeptide. In keeping with standardpolypeptide nomenclature, J. Biol. Chem., 243:3552-59 (1969),abbreviations for amino acid residues are shown in the following Tableof Correspondence:

    ______________________________________                                        TABLE OF CORRESPONDENCE                                                             SYMBOL                                                                  1-Letter      3-Letter    AMINO ACID                                          ______________________________________                                        Y             Tyr         tyrosine                                              G Gly glycine                                                                 F Phe phenylalanine                                                           M Met methionine                                                              A Ala alanine                                                                 S Ser serine                                                                  I Ile isoleucine                                                              L Leu leucine                                                                 T Thr threonine                                                               V Val valine                                                                  P Pro proline                                                                 K Lys lysine                                                                  H His histidine                                                               Q Gln glutamine                                                               E Glu glutamic acid                                                           W Trp tryptophan                                                              R Arg arginine                                                                D Asp aspartic acid                                                           N Asn asparagine                                                              C Cys cysteine                                                              ______________________________________                                    

It should be noted that all amino-acid residue sequences are representedherein by formulae whose left and right orientation is in theconventional direction of amino-terminus to carboxy-terminus.Furthermore, it should be noted that a dash at the beginning or end ofan amino acid residue sequence indicates a peptide bond to a furthersequence of one or more amino-acid residues. The above Table ispresented to correlate the three-letter and one-letter notations whichmay appear alternately herein.

A "replicon" is any genetic element (e.g., plasmid, chromosome, virus)that functions as an autonomous unit of DNA replication in vivo; i.e.,capable of replication under its own control.

A "vector" is a replicon, such as plasmid, phage or cosmid, to whichanother DNA segment may be attached so as to bring about the replicationof the attached segment.

A "DNA molecule" refers to the polymeric form of deoxyribonucleotides(adenine, guanine, thymine, or cytosine) in its either single strandedform, or a double-stranded helix. This term refers only to the primaryand secondary structure of the molecule, and does not limit it to anyparticular tertiary forms. Thus, this term includes double-stranded DNAfound, inter alia, in linear DNA molecules (e.g., restrictionfragments), viruses, plasmids, and chromosomes. In discussing thestructure of particular double-stranded DNA molecules, sequences may bedescribed herein according to the normal convention of giving only thesequence in the 5' to 3' direction along the nontranscribed strand ofDNA (i.e., the strand having a sequence homologous to the mRNA).

An "origin of replication" refers to those DNA sequences thatparticipate in DNA synthesis.

A DNA "coding sequence" is a double-stranded DNA sequence which istranscribed and translated into a polypeptide in vivo when placed underthe control of appropriate regulatory sequences. The boundaries of thecoding sequence are determined by a start codon at the 5' (amino)terminus and a translation stop codon at the 3' (carboxyl) terminus. Acoding sequence can include, but is not limited to, prokaryoticsequences, cDNA from eukaryotic mRNA, genomic DNA sequences fromeukaryotic (e.g., mammalian) DNA, and even synthetic DNA sequences. Apolyadenylation signal and transcription termination sequence willusually be located 3' to the coding sequence.

Transcriptional and translational control sequences are DNA regulatorysequences, such as promoters, enhancers, polyadenylation signals,terminators, and the like, that provide for the expression of a codingsequence in a host cell.

A "promoter sequence" is a DNA regulatory region capable of binding RNApolymerase in a cell and initiating transcription of a downstream (3'direction) coding sequence. For purposes of defining the presentinvention, the promoter sequence is bounded at its 3' terminus by thetranscription initiation site and extends upstream (5' direction) toinclude the minimum number of bases or elements necessary to initiatetranscription at levels detectable above background. Within the promotersequence will be found a transcription initiation site (convenientlydefined by mapping with nuclease S1), as well as protein binding domains(consensus sequences) responsible for the binding of RNA polymerase.Eukaryotic promoters will often, but not always, contain "TATA" boxesand "CAT" boxes. Prokaryotic promoters contain Shine-Dalgarno sequencesin addition to the -10 and -35 consensus sequences.

An "expression control sequence" is a DNA sequence that controls andregulates the transcription and translation of another DNA sequence. Acoding sequence is "under the control" of transcriptional andtranslational control sequences in a cell when RNA polymerasetranscribes the coding sequence into mRNA, which is then translated intothe protein encoded by the coding sequence.

A "signal sequence" can be included before the coding sequence. Thissequence encodes a signal peptide, N-terminal to the polypeptide, thatcommunicates to the host cell to direct the polypeptide to the cellsurface or secrete the polypeptide into the media, and this signalpeptide is clipped off by the host cell before the protein leaves thecell. Signal sequences can be found associated with a variety ofproteins native to prokaryotes and eukaryotes.

The term "oligonucleotide", as used herein in referring to the probe ofthe present invention, is defined as a molecule comprised of two or moreribonucleotides, preferably more than three. Its exact size will dependupon many factors which, in turn, depend upon the ultimate function anduse of the oligonucleotide.

The term "primer" as used herein refers to an oligonucleotide, whetheroccurring naturally as in a purified restriction digest or producedsynthetically, which is capable of acting as a point of initiation ofsynthesis when placed under conditions in which synthesis of a primerextension product, which is complementary to a nucleic acid strand, isinduced, i.e., in the presence of nucleotides and an inducing agent suchas a DNA polymerase and at a suitable temperature and pH. The primer maybe either single-stranded or double-stranded and must be sufficientlylong to prime the synthesis of the desired extension product in thepresence of the inducing agent. The exact length of the primer willdepend upon many factors, including temperature, source of primer anduse of the method. For example, for diagnostic applications, dependingon the complexity of the target sequence, the oligonucleotide primertypically contains 15-25 or more nucleotides, although it may containfewer nucleotides.

The primers herein are selected to be "substantially" complementary todifferent strands of a particular target DNA sequence. This means thatthe primers must be sufficiently complementary to hybridize with theirrespective strands. Therefore, the primer sequence need not reflect theexact sequence of the template. For example, a non-complementarynucleotide fragment may be attached to the 5' end of the primer, withthe remainder of the primer sequence being complementary to the strand.Alternatively, non-complementary bases or longer sequences can beinterspersed into the primer, provided that the primer sequence hassufficient complementarity with the sequence of the strand to hybridizetherewith and thereby form the template for the synthesis of theextension product.

As used herein, the terms "restriction endonucleases" and "restrictionenzymes" refer to bacterial enzymes, each of which cut double-strandedDNA at or near a specific nucleotide sequence.

A cell has been "transformed" by exogenous or heterologous DNA when suchDNA has been introduced inside the cell. The transforming DNA may or maynot be integrated (covalently linked) into chromosomal DNA making up thegenome of the cell. In prokaryotes, yeast, and mammalian cells forexample, the transforming DNA may be maintained on an episomal elementsuch as a plasmid. With respect to eukaryotic cells, a stablytransformed cell is one in which the transforming DNA has becomeintegrated into a chromosome so that it is inherited by daughter cellsthrough chromosome replication. This stability is demonstrated by theability of the eukaryotic cell to establish cell lines or clonescomprised of a population of daughter cells containing the transformingDNA. A "clone" is a population of cells derived from a single cell orcommon ancestor by mitosis. A "cell line" is a clone of a primary cellthat is capable of stable growth in vitro for many generations.

Two DNA sequences are "substantially homologous" when at least about 75%(preferably at least about 80%, and most preferably at least about 90 or95%) of the nucleotides match over the defined length of the DNAsequences. Sequences that are substantially homologous can be identifiedby comparing the sequences using standard software available in sequencedata banks, or in a Southern hybridization experiment under, forexample, stringent conditions as defined for that particular system.Defining appropriate hybridization conditions is within the skill of theart. See, e.g., Maniatis et al., supra; DNA Cloning, Vols. I & II,supra; Nucleic Acid Hybridization, supra.

A "heterologous" region of the DNA construct is an identifiable segmentof DNA within a larger DNA molecule that is not found in associationwith the larger molecule in nature. Thus, when the heterologous regionencodes a mammalian gene, the gene will usually be flanked by DNA thatdoes not flank the mammalian genomic DNA in the genome of the sourceorganism. Another example of a heterologous coding sequence is aconstruct where the coding sequence itself is not found in nature (e.g.,a cDNA where the genomic coding sequence contains introns, or syntheticsequences having codons different than the native gene). Allelicvariations or naturally-occurring mutational events do not give rise toa heterologous region of DNA as defined herein.

An "antibody" is any immunoglobulin, including antibodies and fragmentsthereof, that binds a specific epitope. The term encompasses polyclonal,monoclonal, and chimeric antibodies, the last mentioned described infurther detail in U.S. Pat. Nos. 4,816,397 and 4,816,567.

An "antibody combining site" is that structural portion of an antibodymolecule comprised of heavy and light chain variable and hypervariableregions that specifically binds antigen.

The phrase "antibody molecule" in its various grammatical forms as usedherein contemplates both an intact immunoglobulin molecule and animmunologically active portion of an immunoglobulin molecule.

Exemplary antibody molecules are intact immunoglobulin molecules,substantially intact immunoglobulin molecules and those portions of animmunoglobulin molecule that contains the paratope, including thoseportions known in the art as Fab, Fab', F(ab')₂ and F(v), which portionsare preferred for use in the therapeutic methods described herein.

Fab and F(ab')₂ portions of antibody molecules are prepared by theproteolytic reaction of papain and pepsin, respectively, onsubstantially intact antibody molecules by methods that are well-known.See for example, U.S. Pat. No. 4,342,566 to Theofilopolous et al. Fab'antibody molecule portions are also well-known and are produced fromF(ab')₂ portions followed by reduction of the disulfide bonds linkingthe two heavy chain portions as with mercaptoethanol, and followed byalkylation of the resulting protein mercaptan with a reagent such asiodoacetamide. An antibody containing intact antibody molecules ispreferred herein.

The phrase "monoclonal antibody" in its various grammatical forms refersto an antibody having only one species of antibody combining sitecapable of immunoreacting with a particular antigen. A monoclonalantibody thus typically displays a single binding affinity for anyantigen with which it immunoreacts. A monoclonal antibody may thereforecontain an antibody molecule having a plurality of antibody combiningsites, each immunospecific for a different antigen; e.g., a bispecific(chimeric) monoclonal antibody.

The phrase "pharmaceutically acceptable" refers to molecular entitiesand compositions that are physiologically tolerable and do not typicallyproduce an allergic or similar untoward reaction, such as gastric upset,dizziness and the like, when administered to a human.

The phrase "therapeutically effective amount" is used herein to mean anamount sufficient to prevent, and preferably reduce by at least about 30percent, more preferably by at least 50 percent, most preferably by atleast 90 percent, a clinically significant change in the S phaseactivity of a target cellular mass, or other feature of pathology suchas for example, elevated blood pressure, fever or white cell count asmay attend its presence and activity.

A DNA sequence is "operatively linked" to an expression control sequencewhen the expression control sequence controls and regulates thetranscription and translation of that DNA sequence. The term"operatively linked" includes having an appropriate start signal (e.g.,ATG) in front of the DNA sequence to be expressed and maintaining thecorrect reading frame to permit expression of the DNA sequence under thecontrol of the expression control sequence and production of the desiredproduct encoded by the DNA sequence. If a gene that one desires toinsert into a recombinant DNA molecule does not contain an appropriatestart signal, such a start signal can be inserted in front of the gene.

The term "standard hybridization conditions" refers to salt andtemperature conditions substantially equivalent to 5×SSC and 65° C. forboth hybridization and wash.

In its primary aspect, the present invention concerns the identificationof a receptor recognition factor, and the isolation and sequencing of aparticular receptor recognition factor protein, that is believed to bepresent in cytoplasm and that serves as a signal transducer between aparticular cellular receptor having bound thereto an equally specificpolypeptide ligand, and the comparably specific transcription factorthat enters the nucleus of the cell and interacts with a specific DNAbinding site for the activation of the gene to promote the predeterminedresponse to the particular polypeptide stimulus. The present disclosureconfirms that specific and individual receptor recognition factors existthat correspond to known stimuli such as tumor necrosis factor, nervegrowth factor, platelet-derived growth factor and the like. Specificevidence of this is set forth herein with respect to the interferons αand γ (IFNα and IFNγ).

A further property of the receptor recognition factors (also termedherein signal transducers and activators of transcription--STAT) isdimerization to form homodimers or heterodimers upon activation byphosphorylation of tyrosine. In a specific embodiment, infra, Stat91 andStat84 form homodimers and a Stat91-Stat84 heterodimer. Accordingly, thepresent invention is directed to such dimers, which can formspontaneously by phophorylation of the STAT protein, or which can beprepared synthetically by chemically cross-linking two like or unlikeSTAT proteins.

The present receptor recognition factor is likewise noteworthy in thatit appears not to be demonstrably affected by fluctuations in secondmessenger activity and concentration. The receptor recognition factorproteins appear to act as a substrate for tyrosine kinase domains,however do not appear to interact with G-proteins, and therefore do notappear to be second messengers.

A particular receptor recognition factor identified herein by SEQ IDNO:4, has been determined to be present in cytoplasm and serves as asignal transducer and a specifice transcription factor in response toIFN-γ stimulation that enters the nucleus of the cell and interactsdirectly with a specific DNA binding site for the activation of the geneto promote the predetermined response to the particular polypeptidestimulus. This particular factor also acts as a translation protein and,in particular, as a DNA binding protein in response to interferon-γstimulation. This factor is likewise noteworthy in that it has thefollowing characteristics:

a) It interacts with an interferon-γ-bound receptor kinase complex;

b) It is a tyrosine kinase substrate; and

c) When phosphorylated, it serves as a DNA binding protein.

More particularly, the factor of SEQ ID NO:4 directly interacts with DNAafter acquiring phosphate on tyrosine located at position 701 of theamino acid sequence. Also, interferon-γ-dependent activation of thisfactor occurs without new protein synthesis and appears within minutesof interferon-γ treatment, achieves maximum extent between 15 and 30minutes thereafter, and then disappears after 2-3 hours.

In a particular embodiment, the present invention relates to all membersof the herein disclosed family of receptor recognition factors exceptthe 91 kD protein factors, specifically the proteins whose sequences arerepresented by one or more of SEQ ID NO:4, SEQ ID NO:6 or SEQ ID NO:8.

Subsequent to the filing of the initial applications directed to thepresent invention, the inventors have termed each member of the familyof receptor recognition factors as a signal transducer and activator oftranscription (STAT) protein. Each STAT protein is designated by theapparent molecular weight (e.g., Stat113, Stat91, Stat84, etc.), or bythe order in which it has been identified (e.g., Stat1α [Stat91], Stat1β[Stat84], Stat2 [Stat113], Stat3 [a murine protein described in U.S.application Ser. No. 08/126,588, filed Sep. 24, 1993 as 19sf6], andStat4 [a murine STAT protein described in U.S. application Ser. No.08/126,588, filed Sep. 24, 1993 as 13sf1]). As will be readilyappreciated by one of ordinary skill in the art, the choice of name hasno effect on the intrinsic characteristics of the factors describedherein, which were first disclosed in U.S. application Ser. No.07/845,296, filed Mar. 19, 1992. The present inventors have chosen toadopt this newly derived terminology herein as a convenience to theskilled artisan who is familiar with the subsequently published papersrelating to the same, and in accordance with the proposal to harmonizethe terminology for the novel class of proteins, and nucleic acidsencoding the proteins, disclosed by the instant inventors. The terms[molecular weight] kd receptor recognition factor, Stat [molecularweight], and Stat[number] are used herein interchangeably, and have themeanings given above. For example, the terms 91 kd protein, Stat91, andStat1α refer to the same protein, and in the appropriate context referto the nucleic acid molecule encoding such protein.

As stated above, the present invention also relates to a recombinant DNAmolecule or cloned gene, or a degenerate variant thereof, which encodesa receptor recognition factor, or a fragment thereof, that possesses amolecular weight of about 113 kD and an amino acid sequence set forth inFIG. 1 (SEQ ID NO:2); preferably a nucleic acid molecule, in particulara recombinant DNA molecule or cloned gene, encoding the 113 kD receptorrecognition factor has a nucleotide sequence or is complementary to aDNA sequence shown in FIG. 1 (SEQ ID NO:1). In another embodiment, thereceptor recognition factor has a molecular weight of about 91 kD andthe amino acid sequence set forth in FIG. 2 (SEQ ID NO:4) or FIG. 13(SEQ ID NO:8); preferably a nucleic acid molecule, in particular arecombinant DNA molecule or cloned gene, encoding the 91 kD receptorrecognition factor has a nucleotide sequence or is complementary to aDNA seqnece shown in FIG. 2 (SEQ ID NO:3) or FIG. 13 (SEQ ID NO:8). Inyet a further embodiment, the receptor recognition factor has amolecular weight of about 84 kD and the amino acid sequence set forth inFIG. 3 (SEQ ID NO:6); preferably a nucleic acid molecule, in particulara recombinant DNA molecule or cloned gene, encoding the 84 kD receptorrecognition factor has a nucleotide sequence or is complementary to aDNA sequence shown in FIG. 3 (SEQ ID NO:5). In yet another embodiment,the receptor recognition factor has an amino acid sequence set forth inFIG. 14 (SEQ ID NO:10); preferably a nucleic acid molecule, inparticular a recombinant DNA molecule or cloned gene, encoding suchreceptor recognition factor has a nucleotide sequence or iscomplementary to a DNA sequence shown in FIG. 14 (SEQ ID NO:9). In stillanother embodiment, the receptor recognition factor has an amino acidsequence set forth in FIG. 15 (SEQ ID NO:12); preferably a nucleic acidmolecule, in particular a recombinant DNA molecule or cloned gene,encoding such receptor recognition factor has a nucleotide sequence oris complementary to a DNA seqnece shown in FIG. 15 (SEQ ID NO:11).

The possibilities both diagnostic and therapeutic that are raised by theexistence of the receptor recognition factor or factors, derive from thefact that the factors appear to participate in direct and causalprotein-protein interaction between the receptor that is occupied by itsligand, and those factors that thereafter directly interface with thegene and effect transcription and accordingly gene activation. Assuggested earlier and elaborated further on herein, the presentinvention contemplates pharmaceutical intervention in the cascade ofreactions in which the receptor recognition factor is implicated, tomodulate the activity initiated by the stimulus bound to the cellularreceptor.

Thus, in instances where it is desired to reduce or inhibit the geneactivity resulting from a particular stimulus or factor, an appropriateinhibitor of the receptor recognition factor could be introduced toblock the interaction of the receptor recognition factor with thosefactors causally connected with gene activation. Correspondingly,instances where insufficient gene activation is taking place could beremedied by the introduction of additional quantities of the receptorrecognition factor or its chemical or pharmaceutical cognates, analogs,fragments and the like.

As discussed earlier, the recognition factors or their binding partnersor other ligands or agents exhibiting either mimicry or antagonism tothe recognition factors or control over their production, may beprepared in pharmaceutical compositions, with a suitable carrier and ata strength effective for administration by various means to a patientexperiencing an adverse medical condition associated specifictranscriptional stimulation for the treatment thereof. A variety ofadministrative techniques may be utilized, among them parenteraltechniques such as subcutaneous, intravenous and intraperitonealinjections, catheterizations and the like. Average quantities of therecognition factors or their subunits may vary and in particular shouldbe based upon the recommendations and prescription of a qualifiedphysician or veterinarian.

Also, antibodies including both polyclonal and monoclonal antibodies,and drugs that modulate the production or activity of the recognitionfactors and/or their subunits may possess certain diagnosticapplications and may for example, be utilized for the purpose ofdetecting and/or measuring conditions such as viral infection or thelike. For example, the recognition factor or its subunits may be used toproduce both polyclonal and monoclonal antibodies to themselves in avariety of cellular media, by known techniques such as the hybridomatechnique utilizing, for example, fused mouse spleen lymphocytes andmyeloma cells. Likewise, small molecules that mimic or antagonize theactivity(ies) of the receptor recognition factors of the invention maybe discovered or synthesized, and may be used in diagnostic and/ortherapeutic protocols.

The general methodology for making monoclonal antibodies by hybridomasis well known. Immortal, antibody-producing cell lines can also becreated by techniques other than fusion, such as direct transformationof B lymphocytes with oncogenic DNA, or transfection with Epstein-Barrvirus. See, e.g., M. Schreier et al., "Hybridoma Techniques" (1980);Hammerling et al., "Monoclonal Antibodies And T-cell Hybridomas" (1981);Kennett et al., "Monoclonal Antibodies" (1980); see also U.S. Pat. Nos.4,341,761; 4,399,121; 4,427,783; 4,444,887; 4,451,570; 4,466,917;4,472,500; 4,491,632; 4,493,890.

Panels of monoclonal antibodies produced against recognition factorpeptides can be screened for various properties; i.e., isotype, epitope,affinity, etc. Of particular interest are monoclonal antibodies thatneutralize the activity of the recognition factor or its subunits. Suchmonoclonals can be readily identified in recognition factor activityassays. High affinity antibodies are also useful when immunoaffinitypurification of native or recombinant recognition factor is possible.

Preferably, the anti-recognition factor antibody used in the diagnosticmethods of this invention is an affinity purified polyclonal antibody.More preferably, the antibody is a monoclonal antibody (mAb). Inaddition, it is preferable for the anti- recognition factor antibodymolecules used herein be in the form of Fab, Fab', F(ab')₂ or F(v)portions of whole antibody molecules.

As suggested earlier, the diagnostic method of the present inventioncomprises examining a cellular sample or medium by means of an assayincluding an effective amount of an antagonist to a receptor recognitionfactor/protein, such as an anti-recognition factor antibody, preferablyan affinity-purified polyclonal antibody, and more preferably a mAb. Inaddition, it is preferable for the anti-recognition factor antibodymolecules used herein be in the form of Fab, Fab', F(ab')₂ or F(v)portions or whole antibody molecules. As previously discussed, patientscapable of benefiting from this method include those suffering fromcancer, a pre-cancerous lesion, a viral infection or other likepathological derangement. Methods for isolating the recognition factorand inducing anti-recognition factor antibodies and for determining andoptimizing the ability of anti-recognition factor antibodies to assistin the examination of the target cells are all well-known in the art.

Methods for producing polyclonal anti-polypeptide antibodies arewell-known in the art. See U.S. Pat. No. 4,493,795 to Nestor et al. Amonoclonal antibody, typically containing Fab and/or F(ab')₂ portions ofuseful antibody molecules, can be prepared using the hybridomatechnology described in Antibodies--A Laboratory Manual, Harlow andLane, eds., Cold Spring Harbor Laboratory, New York (1988), which isincorporated herein by reference. Briefly, to form the hybridoma fromwhich the monoclonal antibody composition is produced, a myeloma orother self-perpetuating cell line is fused with lymphocytes obtainedfrom the spleen of a mammal hyperimmunized with a recognitionfactor-binding portion thereof, or recognition factor, or anorigin-specific DNA-binding portion thereof.

Splenocytes are typically fused with myeloma cells using polyethyleneglycol (PEG) 6000. Fused hybrids are selected by their sensitivity toHAT. Hybridomas producing a monoclonal antibody useful in practicingthis invention are identified by their ability to immunoreact with thepresent recognition factor and their ability to inhibit specifiedtranscriptional activity in target cells.

A monoclonal antibody useful in practicing the present invention can beproduced by initiating a monoclonal hybridoma culture comprising anutrient medium containing a hybridoma that secretes antibody moleculesof the appropriate antigen specificity. The culture is maintained underconditions and for a time period sufficient for the hybridoma to secretethe antibody molecules into the medium.

The antibody-containing medium is then collected. The antibody moleculescan then be further isolated by well-known techniques.

Media useful for the preparation of these compositions are bothwell-known in the art and commercially available and include syntheticculture media, inbred mice and the like. An exemplary synthetic mediumis Dulbecco's minimal essential medium (DMEM; Dulbecco et al., Virol.8:396 (1959)) supplemented with 4.5 gm/l glucose, 20 mm glutamine, and20% fetal calf serum. An exemplary inbred mouse strain is the Balb/c.

Methods for producing known in the anti-recognition factor antibodiesare also well-known in the art. See Niman et al., Proc. Natl. Acad. Sci.USA, 80:4949-4953 (1983). Typically, the present recognition factor or apeptide analog is used either alone or conjugated to an immunogeniccarrier, as the immunogen in the before described procedure forproducing anti-recognition factor monoclonal antibodies. The hybridomasare screened for the ability to produce an antibody that immunoreactswith the recognition factor peptide analog and the present recognitionfactor.

The present invention further contemplates therapeutic compositionsuseful in practicing the therapeutic methods of this invention. Asubject therapeutic composition includes, in admixture, apharmaceutically acceptable excipient (carrier) and one or more of areceptor recognition factor, polypeptide analog thereof or fragmentthereof, as described herein as an active ingredient. In a preferredembodiment, the composition comprises an antigen capable of modulatingthe specific binding of the present recognition factor within a targetcell.

The preparation of therapeutic compositions which contain polypeptides,analogs or active fragments as active ingredients is well understood inthe art. Typically, such compositions are prepared as injectables,either as liquid solutions or suspensions, however, solid forms suitablefor solution in, or suspension in, liquid prior to injection can also beprepared. The preparation can also be emulsified. The active therapeuticingredient is often mixed with excipients which are pharmaceuticallyacceptable and compatible with the active ingredient. Suitableexcipients are, for example, water, saline, dextrose, glycerol, ethanol,or the like and combinations thereof. In addition, if desired, thecomposition can contain minor amounts of auxiliary substances such aswetting or emulsifying agents, pH buffering agents which enhance theeffectiveness of the active ingredient.

A polypeptide, analog or active fragment can be formulated into thetherapeutic composition as neutralized pharmaceutically acceptable saltforms. Pharmaceutically acceptable salts include the acid addition salts(formed with the free amino groups of the polypeptide or antibodymolecule) and which are formed with inorganic acids such as, forexample, hydrochloric or phosphoric acids, or such organic acids asacetic, oxalic, tartaric, mandelic, and the like. Salts formed from thefree carboxyl groups can also be derived from inorganic bases such as,for example, sodium, potassium, ammonium, calcium, or ferric hydroxides,and such organic bases as isopropylamine, trimethylamine, 2-ethylaminoethanol, histidine, procaine, and the like.

The therapeutic polypeptide-, analog- or active fragment-containingcompositions are conventionally administered intravenously, as byinjection of a unit dose, for example. The term "unit dose" when used inreference to a therapeutic composition of the present invention refersto physically discrete units suitable as unitary dosage for humans, eachunit containing a predetermined quantity of active material calculatedto produce the desired therapeutic effect in association with therequired diluent; i.e., carrier, or vehicle.

The compositions are administered in a manner compatible with the dosageformulation, and in a therapeutically effective amount. The quantity tobe administered depends on the subject to be treated, capacity of thesubject's immune system to utilize the active ingredient, and degree ofinhibition or neutralization of recognition factor binding capacitydesired. Precise amounts of active ingredient required to beadministered depend on the judgment of the practitioner and are peculiarto each individual. However, suitable dosages may range from about 0.1to 20, preferably about 0.5 to about 10, and more preferably one toseveral, milligrams of active ingredient per kilogram body weight ofindividual per day and depend on the route of administration. Suitableregimes for initial administration and booster shots are also variable,but are typified by an initial administration followed by repeated dosesat one or more hour intervals by a subsequent injection or otheradministration. Alternatively, continuous intravenous infusionsufficient to maintain concentrations of ten nanomolar to ten micromolarin the blood are contemplated.

The therapeutic compositions may further include an effective amount ofthe factor/factor synthesis promoter antagonist or analog thereof, andone or more of the following active ingredients: an antibiotic, asteroid. Exemplary formulations are given below:

    ______________________________________                                        Formulations                                                                        Ingredient        mg/ml                                                 ______________________________________                                        Intravenous Formulation I                                                       cefotaxime 250.0                                                              receptor recognition factor 10.0                                              dextrose USP 45.0                                                             sodium bisulfite USP 3.2                                                      edetate disodium USP 0.1                                                      water for injection q.s.a.d. 1.0 ml                                           Intravenous Formulation II                                                    ampicillin 250.0                                                              receptor recognition factor 10.0                                              sodium bisulfite USP 3.2                                                      disodium edetate USP 0.1                                                      water for injection q.s.a.d. 1.0 ml                                           Intravenous Formulation III                                                   gentamicin (charged as sulfate) 40.0                                          receptor recognition factor 10.0                                              sodium bisulfite USP 3.2                                                      disodium edetate USP 0.1                                                      water for injection q.s.a.d. 1.0 ml                                           Intravenous Formulation IV                                                    recognition factor 10.0                                                       dextrose USP 45.0                                                             sodium bisulfite USP 3.2                                                      edetate disodium USP 0.1                                                      water for injection q.s.a.d. 1.0 ml                                           Intravenous Formulation V                                                     recognition factor antagonist 5.0                                             sodium bisulfite USP 3.2                                                      disodium edetate USP 0.1                                                      water for injection q.s.a.d. 1.0 ml                                         ______________________________________                                    

As used herein, "pg" means picogram, "ng" means nanogram, "ug" or "μg"mean microgram, "mg" means milligram, "ul" or "μl" mean microliter, "ml"means milliliter, "1" means liter.

Another feature of this invention is the expression of the DNA sequencesdisclosed herein. As is well known in the art, DNA sequences may beexpressed by operatively linking them to an expression control sequencein an appropriate expression vector and employing that expression vectorto transform an appropriate unicellular host.

Such operative linking of a DNA sequence of this invention to anexpression control sequence, of course, includes, if not already part ofthe DNA sequence, the provision of an initiation codon, ATG, in thecorrect reading frame upstream of the DNA sequence.

A wide variety of host/expression vector combinations may be employed inexpressing the DNA sequences of this invention. Useful expressionvectors, for example, may consist of segments of chromosomal,non-chromosomal and Synthetic DNA sequences. Suitable vectors includederivatives of SV40 and known bacterial plasmids, e.g., E. coli plasmidscol El, pCR1, pBR322, pMB9 and their derivatives, plasmids such as RP4;phage DNAS, e.g., the numerous derivatives of phage λ, e.g., NM989, andother phage DNA, e.g., M13 and Filamentous single stranded phage DNA;yeast plasmids such as the 2μ plasmid or derivatives thereof; vectorsuseful in eukaryotic cells, such as vectors useful in insect ormammalian cells; vectors derived from combinations of plasmids and phageDNAS, such as plasmids that have been modified to employ phage DNA orother expression control sequences; and the like.

Any of a wide variety of expression control sequences--sequences thatcontrol the expression of a DNA sequence operatively linked to it--maybe used in these vectors to express the DNA sequences of this invention.Such useful expression control sequences include, for example, the earlyor late promoters of SV40, CMV, vaccinia, polyoma or adenovirus, the lacsystem, the trp system, the TAC system, the TRC system, the LTR system,the major operator and promoter regions of phage λ, the control regionsof fd coat protein, the promoter for 3-phosphoglycerate kinase or otherglycolytic enzymes, the promoters of acid phosphatase (e.g., Pho5), thepromoters of the yeast α-mating factors, and other sequences known tocontrol the expression of genes of prokaryotic or eukaryotic cells ortheir viruses, and various combinations thereof.

A wide variety of unicellular host cells are also useful in expressingthe DNA sequences of this invention. These hosts may include well knowneukaryotic and prokaryotic hosts, such as strains of E. coli,Pseudomonas, Bacillus, Streptomyces, fungi such as yeasts, and animalcells, such as CHO, R1.1, B-W and L-M cells, African Green Monkey kidneycells (e.g., COS 1, COS 7, BSC1, BSC40, and BMT10), insect cells (e.g.,Sf9), and human cells and plant cells in tissue culture.

It will be understood that not all vectors, expression control sequencesand hosts will function equally well to express the DNA sequences ofthis invention. Neither will all hosts function equally well with thesame expression system.

However, one skilled in the art will be able to select the propervectors, expression control sequences, and hosts without undueexperimentation to accomplish the desired expression without departingfrom the scope of this invention. For example, in selecting a vector,the host must be considered because the vector must function in it. Thevector's copy number, the ability to control that copy number, and theexpression of any other proteins encoded by the vector, such asantibiotic markers, will also be considered.

In selecting an expression control sequence, a variety of factors willnormally be considered. These include, for example, the relativestrength of the system, its controllability, and its compatibility withthe particular DNA sequence or gene to be expressed, particularly asregards potential secondary structures. Suitable unicellular hosts willbe selected by consideration of, e.g., their compatibility with thechosen vector, their secretion characteristics, their ability to foldproteins correctly, and their fermentation requirements, as well as thetoxicity to the host of the product encoded by the DNA sequences to beexpressed, and the ease of purification of the expression products.

Considering these and other factors a person skilled in the art will beable to construct a variety of vector/expression control sequence/hostcombinations that will express the DNA sequences of this invention onfermentation or in large scale animal culture.

It is further intended that receptor recognition factor analogs may beprepared from nucleotide sequences of the protein complex/subunitderived within the scope of the present invention. Analogs, such asfragments, may be produced, for example, by pepsin digestion of receptorrecognition factor material. Other analogs, such as muteins, can beproduced by standard site-directed mutagenesis of receptor recognitionfactor coding sequences. Analogs exhibiting "receptor recognition factoractivity" such as small molecules, whether functioning as promoters orinhibitors, may be identified by known in vivo and/or in vitro assays.

As mentioned above, a DNA sequence encoding receptor recognition factorcan be prepared synthetically rather than cloned. The DNA sequence canbe designed with the appropriate codons for the receptor recognitionfactor amino acid sequence. In general, one will select preferred codonsfor the intended host if the sequence will be used for expression. Thecomplete sequence is assembled from overlapping oligonucleotidesprepared by standard methods and assembled into a complete codingsequence. See, e.g., Edge, Nature, 292:756 (1981); Nambair et al.,Science, 223:1299 (1984); Jay et al., J. Biol. Chem., 259:6311 (1984).

Synthetic DNA sequences allow convenient construction of genes whichwill express receptor recognition factor analogs or "muteins".Alternatively, DNA encoding muteins can be made by site-directedmutagenesis of native receptor recognition factor genes or cDNAs, andmuteins can be made directly using conventional polypeptide synthesis.

A general method for site-specific incorporation of unnatural aminoacids into proteins is described in Christopher J. Noren, Spencer J.Anthony-Cahill, Michael C. Griffith, Peter G. Schultz, Science,244:182-188 (April 1989). This method may be used to create analogs withunnatural amino acids.

The present invention extends to the preparation of antisensenucleotides and ribozymes that may be used to interfere with theexpression of the receptor recognition proteins at the translationallevel. This approach utilizes antisense nucleic acid and ribozymes toblock translation of a specific mRNA, either by masking that mRNA withan antisense nucleic acid or cleaving it with a ribozyme.

Antisense nucleic acids are DNA or RNA molecules that are complementaryto at least a portion of a specific mRNA molecule. (See Weintraub, 1990;Marcus-Sekura, 1988.) In the cell, they hybridize to that mRNA, forminga double stranded molecule. The cell does not translate an mRNA in thisdouble-stranded form. Therefore, antisense nucleic acids interfere withthe expression of mRNA into protein. Oligomers of about fifteennucleotides and molecules that hybridize to the AUG initiation codonwill be particularly efficient, since they are easy to synthesize andare likely to pose fewer problems than larger molecules when introducingthem into receptor recognition factor-producing cells. Antisense methodshave been used to inhibit the expression of many genes in vitro(Marcus-Sekura, 1988; Hambor et al., 1988).

Ribozymes are RNA molecules possessing the ability to specificallycleave other single stranded RNA molecules in a manner somewhatanalogous to DNA restriction endonucleases. Ribozymes were discoveredfrom the observation that certain mRNAs have the ability to excise theirown introns. By modifying the nucleotide sequence of these RNAs,researchers have been able to engineer molecules that recognize specificnucleotide sequences in an RNA molecule and cleave it (Cech, 1988.).Because they are sequence-specific, only mRNAs with particular sequencesare inactivated.

Investigators have identified two types of ribozymes, Tetrahymena-typeand "hammerhead"-type. (Hasselhoff and Gerlach, 1988) Tetrahymena-typeribozymes recognize four-base sequences, while "hammerhead"-typerecognize eleven- to eighteen-base sequences. The longer the recognitionsequence, the more likely it is to occur exclusively in the target mRNAspecies. Therefore, hammerhead-type ribozymes are preferable toTetrahymena-type ribozymes for inactivating a specific mRNA species, andeighteen base recognition sequences are preferable to shorterrecognition sequences.

The DNA sequences described herein may thus be used to prepare antisensemolecules against, and ribozymes that cleave mRNAs for receptorrecognition factor proteins and their ligands.

The present invention also relates to a variety of diagnosticapplications, including methods for detecting the presence of stimulisuch as the earlier referenced polypeptide ligands, by reference totheir ability to elicit the activities which are mediated by the presentreceptor recognition factor. As mentioned earlier, the receptorrecognition factor can be used to produce antibodies to itself by avariety of known techniques, and such antibodies could then be isolatedand utilized as in tests for the presence of particular transcriptionalactivity in suspect target cells.

As described in detail above, antibody(ies) to the receptor recognitionfactor can be produced and isolated by standard methods including thewell known hybridoma techniques. For convenience, the antibody(ies) tothe receptor recognition factor will be referred to herein as Ab₁, andantibody(ies) raised in another species as Ab₂.

The presence of receptor recognition factor in cells can be ascertainedby the usual immunological procedures applicable to such determinations.A number of useful procedures are known. Three such procedures which areespecially useful utilize either the receptor recognition factor labeledwith a detectable label, antibody Ab₁ labeled with a detectable label,or antibody Ab₂ labeled with a detectable label. The procedures may besummarized by the following equations wherein the asterisk indicatesthat the particle is labeled, and "RRF" stands for the receptorrecognition factor:

    RRF*+Ab.sub.1 =RRF*Ab.sub.1                                A.

    RRF+Ab*=RRFAb.sub.1 *                                      B.

    RRF+Ab.sub.1 +Ab.sub.2 *=RRFAb.sub.1 Ab.sub.2 *            C.

The procedures and their application are all familiar to those skilledin the art and accordingly may be utilized within the scope of thepresent invention. The "competitive" procedure, Procedure A, isdescribed in U.S. Pat. Nos. 3,654,090 and 3,850,752. Procedure C, the"sandwich" procedure, is described in U.S. Pat. Nos. RE 31,006 and4,016,043. Still other procedures are known such as the "doubleantibody", or "DASP" procedure.

In each instance, the receptor recognition factor forms complexes withone or more antibody(ies) or binding partners and one member of thecomplex is labeled with a detectable label. The fact that a complex hasformed and, if desired, the amount thereof, can be determined by knownmethods applicable to the detection of labels.

It will be seen from the above, that a characteristic property of Ab2 isthat it will react with Ab₁. This is because Ab₁ raised in one mammalianspecies has been used in another species as an antigen to raise theantibody Ab₂. For example, Ab2 may be raised in goats using rabbitantibodies as antigens. Ab₂ therefore would be anti-rabbit antibodyraised in goats. For purposes of this description and claims, Ab₁ willbe referred to as a primary or anti-receptor recognition factorantibody, and Ab₂ will be referred to as a secondary or anti-Ab₁antibody.

The labels most commonly employed for these studies are radioactiveelements, enzymes, chemicals which fluoresce when exposed to ultravioletlight, and others.

A number of fluorescent materials are known and can be utilized aslabels. These include, for example, fluorescein, rhodamine and auramine.A particular detecting material is anti-rabbit antibody prepared ingoats and conjugated with fluorescein through an isothiocyanate.

The receptor recognition factor or its binding partner(s) can also belabeled with a radioactive element or with an enzyme. The radioactivelabel can be detected by any of the currently available countingprocedures. The preferred isotope may be selected from ³ H, ¹⁴ C, ³² P,³⁵ S, ³⁶ Cl, ⁵¹ Cr, ⁵⁷ Co, ⁵⁸ Co, ⁵⁹ Fe, ⁹⁰ Y, ¹²⁵ I, ¹³¹ I, and ¹⁸⁶ Re.

Enzyme labels are likewise useful, and can be detected by any of thepresently utilized colorimetric, spectrophotometric,fluorospectrophotometric, amperometric or gasometric techniques. Theenzyme is conjugated to the selected particle by reaction with bridgingmolecules such as carbodiimides, diisocyanates, glutaraldehyde and thelike. Many enzymes which can be used in these procedures are known andcan be utilized. The preferred are peroxidase, β-glucuronidase,β-D-glucosidase, β-D-galactosidase, urease, glucose oxidase plusperoxidase and alkline phosphatase. U.S. Pat. Nos. 3,654,090; 3,850,752;and 4,016,043 are referred to by way of example for their disclosure ofalternate labeling material and methods.

A particular assay system developed and utilized in accordance with thepresent invention, is known as a receptor assay. In a receptor assay,the material to be assayed is appropriately labeled and then certaincellular test colonies are inoculated with a quantity of both thelabeled and unlabeled material after which binding studies are conductedto determine the extent to which the labeled material binds to the cellreceptors. In this way, differences in affinity between materials can beascertained.

Accordingly, a purified quantity of the receptor recognition factor maybe radiolabeled and combined, for example, with antibodies or otherinhibitors thereto, after which binding studies would be carried out.Solutions would then be prepared that contain various quantities oflabeled and unlabeled uncombined receptor recognition factor, and cellsamples would then be inoculated and thereafter incubated. The resultingcell monolayers are then washed, solubilized and then counted in a gammacounter for a length of time sufficient to yield a standard error of<5%. These data are then subjected to Scatchard analysis after whichobservations and conclusions regarding material activity can be drawn.While the foregoing is exemplary, it illustrates the manner in which areceptor assay may be performed and utilized, in the instance where thecellular binding ability of the assayed material may serve as adistinguishing characteristic.

An assay useful and contemplated in accordance with the presentinvention is known as a "cis/trans" assay. Briefly, this assay employstwo genetic constructs, one of which is typically a plasmid thatcontinually expresses a particular receptor of interest when transfectedinto an appropriate cell line, and the second of which is a plasmid thatexpresses a reporter such as luciferase, under the control of areceptor/ligand complex. Thus, for example, if it is desired to evaluatea compound as a ligand for a particular receptor, one of the plasmidswould be a construct that results in expression of the receptor in thechosen cell line, while the second plasmid would possess a promoterlinked to the luciferase gene in which the response element to theparticular receptor is inserted. If the compound under test is anagonist for the receptor, the ligand will complex with the receptor, andthe resulting complex will bind the response element and initiatetranscription of the luciferase gene. The resulting chemiluminescence isthen measured photometrically, and dose response curves are obtained andcompared to those of known ligands. The foregoing protocol is describedin detail in U.S. Pat. No. 4,981,784 and PCT International PublicationNo. WO 88/03168, for which purpose the artisan is referred.

In a further embodiment of this invention, commercial test kits suitablefor use by a medical specialist may be prepared to determine thepresence or absence of predetermined transcriptional activity orpredetermined transcriptional activity capability in suspected targetcells. In accordance with the testing techniques discussed above, oneclass of such kits will contain at least the labeled receptorrecognition factor or its binding partner, for instance an antibodyspecific thereto, and directions, of course, depending upon the methodselected, e.g., "competitive", "sandwich", "DASP" and the like. The kitsmay also contain peripheral reagents such as buffers, stabilizers, etc.

Accordingly, a test kit may be prepared for the demonstration of thepresence or capability of cells for predetermined transcriptionalactivity, comprising:

(a) a predetermined amount of at least one labeled immunochemicallyreactive component obtained by the direct or indirect attachment of thepresent receptor recognition factor or a specific binding partnerthereto, to a detectable label;

(b) other reagents; and

(c) directions for use of said kit.

More specifically, the diagnostic test kit may comprise:

(a) a known amount of the receptor recognition factor as described above(or a binding partner) generally bound to a solid phase to form animmunosorbent, or in the alternative, bound to a suitable tag, or pluralsuch end products, etc. (or their binding partners) one of each;

(b) if necessary, other reagents; and

(c) directions for use of said test kit.

In a further variation, the test kit may be prepared and used for thepurposes stated above, which operates according to a predeterminedprotocol (e.g. "competitive", "sandwich", "double antibody", etc.), andcomprises:

(a) a labeled component which has been obtained by coupling the receptorrecognition factor to a detectable label;

(b) one or more additional immunochemical reagents of which at least onereagent is a ligand or an immobilized ligand, which ligand is selectedfrom the group consisting of:

(i) a ligand capable of binding with the labeled component (a);

(ii) a ligand capable of binding with a binding partner of the labeledcomponent (a);

(iii) a ligand capable of binding with at least one of the component(s)to be determined; and

(iv) a ligand capable of binding with at least one of the bindingpartners of at least one of the component(s) to be determined; and

(c) directions for the performance of a protocol for the detectionand/or determination of one or more components of an immunochemicalreaction between the receptor recognition factor and a specific bindingpartner thereto.

In accordance with the above, an assay system for screening potentialdrugs effective to modulate the activity of the receptor recognitionfactor may be prepared. The receptor recognition factor may beintroduced into a test system, and the prospective drug may also beintroduced into the resulting cell culture, and the culture thereafterexamined to observe any changes in the transcriptional activity of thecells, due either to the addition of the prospective drug alone, or dueto the effect of added quantities of the known receptor recognitionfactor.

Preliminary Considerations

As mentioned earlier, the observation and conclusion underlying thepresent invention were crystallized from a consideration of the resultsof certain investigations with particular stimuli. Particularly, thepresent disclosure is illustrated by the results of work on proteinfactors that govern transcriptional control of IFNα-stimulated genes, aswell as more recent data on the regulation of transcription of genesstimulated by IFNγ. The following is a brief discussion of the role thatIFN is believed to play in the stimulation of transcription taken fromDarnell et al. THE NEW BIOLOGIST, 2(10), (1990).

Activation of genes by IFNα occurs within minutes of exposure of cellsto this factor (Larner et al., 1984, 1986) and is strictly dependent onthe IFNα binding to its receptor, a 49-kD plasma membrane polypeptide(Uze et al., 1990). However, changes in intracellular second messengerconcentrations secondary to the use of phorbol esters, calciumionophores, or cyclic nucleotide analogs neither triggers nor blocksIFNα-dependent gene activation (Larner et al., 1984; Lew et al., 1989).No other polypeptide, even IFNγ, induces the set ofinterferon-stimulated genes (ISGs) specifically induced by IFNα. Inaddition, it has been found that IFNγ-dependent transcriptionalstimulation of at least one gene in HeLa cells and in fibroblasts isalso strictly dependent on receptor-ligand interaction and is notactivated by induced changes in second messengers (Decker et al., 1989;Lew et al., 1989). These highly specific receptor-ligand interactions,as well as the precise transcriptional response, require theintracellular recognition of receptor occupation and the communicationto the nucleus to be equally specific.

The activation of ISGs by IFNα is carried out by transcriptional factorISGF-3, or interferon stimulated gene factor 3. This factor is activatedpromptly after IFNα treatment without protein synthesis, as istranscription itself (Larner et al., 1986; Levy et al., 1988; Levy etal., 1989). ISGF-3 binds to the ISRE, the interferon-stimulated responseelement, in DNA of the response genes (Reich et al., 1987; Levy et al.,1988), and this binding is affected by all of an extensive set ofmutations that also affects the transcriptional function of the ISRE(Kessler et al., 1988a). Partially purified ISGF-3 containing no otherDNA-binding components can stimulate ISRE-dependent in vitrotranscription (Fu et al., 1990). IFN-dependent stimulation of ISGsoccurs in a cycle, reaching a peak of 2 hours and declining promptlythereafter (Larner et al., 1986). ISGF-3 follows the same cycle (Levy etal., 1988, 1989). Finally, the presence or absence or ISGF3 in a varietyof IFN-sensitive and IFN-resistant cells correlates with thetranscription of ISGs in these cells (Kessler et al., 1988b).

ISGF-3 is composed of two subfractions, ISGF-3α and ISGF-3γ, that arefound in the cytoplasm before IFN binds to its receptor (Levy et al.,1989). When cells are treated with IFNα, ISGF-3 can be detected in thecytoplasm within a minute, that is, some 3 to 4 minutes before anyISGF-3 is found in the nucleus (Levy et al., 1989). The cytoplasmiccomponent ISGF-3γ can be increased in HeLa cells by pretreatment withIFNγ, but IFNγ does not by itself activate transcription of ISGs norraise the concentration of the complete factor, ISGF-3 (Levy et al.,1990). The cytoplasmic localization of the proteins that interact toconstitute ISGF-3 was proved by two kinds of experiments. When cytoplasmof IFNγ-treated cells that lack ISGF-3 was mixed with cytoplasm ofIFNα-treated cells, large amounts of ISGF-3 were formed (Levy et al.,1989). (It was this experiment that indicated the existence of anISGF-3γ component and an ISGF-3α component of ISGF-3).

In addition, Dale et al. (1989) showed that enucleated cells couldrespond to IFNα by forming a DNA-binding protein that is probably thesame as ISGF-3.

The ISGF-3γ component is a 48-kD protein that specifically recognizesthe ISRE (Kessler et al., 1990; Fu et al., 1990). Three other proteins,presumably constituting the ISGF-3α component, were found in an ISGF-3DNA complex (Fu et al., 1990). The entirety of roles of, or therelationships among these three proteins are not yet known, but it isclear that ISGF-3 is a multimeric protein complex. Since the binding ofIFNα to the cell surface converts ISGF-3α from an inactive to an activestatus within a minute, at least one of the proteins constitutingISGF-3α must be affected promptly, perhaps by a direct interaction withthe IFNα receptor.

The details of how the ISGF-3γ component and the three other proteinsare activated by cytoplasmic events and then enter the nucleus to bindthe ISRE and increase transcription are not entirely known. Furtherstudies of the individual proteins, for example, with antibodies, arepresented herein. For example, it is clear that, within 10 minutes ofIFNα treatment, there is more ISGF-3 in the nucleus than in thecytoplasm and that the complete factor has a much higher affinity forthe ISRE than the 48-kD ISGF-3γ component by itself (Kessler et al.,1990).

In summary, the attachment of interferon-α (IFN-α) to its specific cellsurface receptor activates the transcription of a limited set of genes,termed ISGs for "interferon stimulated genes" [Larner et al., PROC.NATL. ACAD. SCI. USA, 81 (1984); Larner et al., J. BIOL. CHEM., 261(1986); Friedman et al., CELL, 38 (1984)]). The observation that agentsthat affect second messenger levels do not activate transcription ofthese genes, led to the proposal that protein:protein interactions inthe cytoplasm beginning at the IFN receptor might act directly intransmitting to the nucleus the signal generated by receptor occupation[Levy et al., NEW BIOLOGIST, 2 (1991)].

To test this hypothesis, the present applicants began experiments in thenucleus at the activated genes. Initially, the ISRE and ISGF-3 werediscovered [Levy et al., GENES & DEV., 2 (1988)].

Partial purification of ISGF-3 followed by recovery of the purifiedproteins from a specific DNA-protein complex revealed that the completecomplex was made up of four proteins [Fu et al., PROC. NATL. ACAD. SCI.USA, 87 (1990); Kessler et al., GENES & DEV., 4 (1990)]. A 48 kD proteintermed ISGF-3γ, because pre-treatment of HeLa cells with IFN-γ increasedits presence, binds DNA weakly on its own [lbid.; and Levy et al., THEEMBO. J., 9 (1990)]. In combination with the IFN-α activated proteins,termed collectively the ISGF-3α proteins, the ISGF-3γ forms a complexthat binds the ISRE with a 50-fold higher affinity [Kessler et al.,GENES & DEV., 4 (1990)]. The ISGF-3α proteins comprise a set ofpolypeptides of 113, 91 and 84 kD. All of the ISGF-3 componentsinitially reside in the cell cytoplasm [Levy et al., GENES & DEV., 3(1989); Dale et al., PROC. NATL. ACAD. SCI. USA, 86 (1989)]. Howeverafter only about five minutes of IFN-α treatment the active complex isfound in the cell nucleus, thus confirming these proteins as a possiblespecific link from an occupied receptor to a limited set of genes [Levyet al., GENES & DEV., 3 (1989)].

In accordance with the present invention, specific proteins comprisingreceptor recognition factors have been isolated and sequenced. Theseproteins, their fragments, antibodies and other constructs and usesthereof, are contemplated and presented herein. To understand themechanism of cytoplasmic activation of the ISGF-3α proteins as well astheir transport to the nucleus and interaction with ISGF-3γ, this factorhas been purified in sufficient quantity to obtain peptide sequence fromeach protein. Degenerate deoxyoligonucleotides that would encode thepeptides were constructed and used in a combination of cDNA libraryscreening and PCR amplification of cDNA products copied from mRNA toidentify cDNA clones encoding each of the four proteins. What follows inthe examples presented herein a description of the final proteinpreparations that allowed the cloning of cDNAs encoding all theproteins, and the primary sequence of the 113 kD protein arising from afirst gene, and the primary sequences of the 91 and 84 kD proteins whichappear to arise from two differently processed RNA products from anothergene. Antisera against portions of the 84 and 91 kD proteins have alsobeen prepared and bind specifically to the ISGF-3 DNA binding factor(detected by the electrophoretic mobility shift assay with cellextracts) indicating that these cloned proteins are indeed part ofISGF-3. The availability of the cDNA and the proteins they encodeprovides the necessary material to understand how the liganded IFN-αreceptor causes immediate cytoplasmic activation of the ISGF-3 proteincomplex, as well as to understand the mechanisms of action of thereceptor recognition factors contemplated herein. The cloning of each ofISGF3-α proteins, and the evaluation and confirmation of the particularrole played by the 91 kD protein as a messenger and DNA binding proteinin response to IFNγ activation, including the development and testing ofantibodies to the receptor recognition factors of the present invention,are all presented in the examples that follow below.

EXAMPLE 1

To purify relatively large amounts of ISGF-3, HeLa cell nuclear extractswere prepared from cells treated overnight (16-18 h) with 0.5 ng/ml ofIFN-γ and 45 min. with IFN-α (500 u/ml). The steps used in the largescale purification were modified slightly from those described earlierin the identification of the four ISGF-3 proteins.

Accordingly, nuclear extracts were made from superinduced HeLa cells[Levy et al., THE EMBO. J., 9 (1990)] and chromatographed as previouslydescribed [Fu et al., PROC. NATL. ACAD. SCI. USA, 87 (1990)] on:phosphocellulose P-11, heparin agarose (Sigma); DNA cellulose(Boehringer Mannheim; flow through was collected after the material wasadjusted to 0.28M KCl and 0.5% NP-40); two successive rounds of ISREoligo affinity column (1.8 ml column, eluted with a linear gradient of0.05 to 1.0M KCl); a point mutant ISRE oligonucleotide affinity column(flow through was collected after the material was adjusted to 0.28MKCl); and a final round on the ISRE oligonucleotide column (material waseluted in a linear 0.05 to 1.0M NaCl gradient adjusted to 0.05% NP-40).Column fractions containing ISGF-3 were subsequently examined for purityby SDS PAGE/silver staining and pooled appropriately. The pooledfractions were concentrated by a centricon-10 (Amicon). The pools offractions from preparations 1 and 2 were combined and run on a 10 cmwide, 1.5 mm thick 7.5% SDS polyacrylamide gel. The proteins wereelectroblotted to nitrocellulose for 12 hrs at 20 volts in 12.5% MeOH,25 mM Tris, 190 mM glycine. The membrane was stained with 0.1% PonceauRed (in 1% acetic acid) and the bands of 113 kD, 91 kD, 84 kD, and 48 kDexcised and subjected to peptide analysis after tryptic digestion[Wedrychowski et al., J. BIOL. CHEM., 265 (1990); Aebersold et al.,PROC. NATL. ACAD. SCI. USA, 84 (1987)]. The resulting peptide sequencesfor the 91 kD and 84 kD proteins are indicated in FIG. 6. Degenerateoligonucleotides were designed based on the peptide sequences t19, t13band t27: (Forward and Reverse complements are denoted by F and R:

    19F     AACGTIGACCAATTNAACATG                                                                           (SEQ ID NO:14)                                           T     T  GC    T                                                            -     T                                                                      13bR GTCGATGTTNGGGTANAG(SEQ ID NO:15)                                          A  A  A    A     A                                                            - 27R GTACAAITCAACCAGNGCAA(SEQ ID NO:16)                                         T    TG  T    T                                                     

The final ISRE oligonucleotide affinity selection yielded material withthe SDS polyacrylamide gel electrophoretic pattern shown in FIG. 4(left). This gel represented about 1.5% of the available materialpurified from over 200 L of appropriately treated HeLa cells. While 113,91, 84 and 48 kD bands were clearly prominent in the final purifiedpreparation (see FIG. 4, right panel), there were also two prominentcontaminants of about 118 and 70 kD and a few of other contaminants inlower amounts. [Amino acid sequence data have shown that thecontaminants of 86 kD and 70 kD are the KU antigen, a widely-distributedprotein that binds DNA termini. However in the specific ISGF-3:ISREcomplex there is no KU antigen and therefore it has been assigned norole in IFN-dependent transcriptional stimulation, [Wedrychowski et al.,J. BIOL. CHEM., 265 (1990)]].

Since the mobility of the 113, 91, 84, and 48 kD proteins could beaccurately marked by comparison with the partially purified proteinscharacterized in previous experiments [Fu et al., PROC. NATL. ACAD. SCI.USA, 87 (1990)], further purification was not attempted at this stage.The total purified sample from 200 L of HeLa cells was loaded onto onegel, subjected to electrophoresis, transferred to nitrocellulose andstained with Ponceau red. The 113, 84, 91, and 48 kD protein bands wereseparately excised and subjected to peptide analysis as described[Aebersold et al., PROC. NATL. ACAD. SCI. USA, 84 (1987)]. Releasedpeptides were collected, separated by HPLC and analyzed for sequencecontent by automated Edman degradation analysis.

Accordingly, the use of the peptide sequence data for three of fourpeptides from the 91 kD protein and a single peptide derived from the 84kD protein is described herein. The peptide sequence and theoligonucleotides constructed from them are given in the legend to FIG. 4or 6. When oligonucleotides 19F and 13bR were used to prime synthesisfrom a HeLa cell cDNA library, a PCR product of 475 bp was generated.When this product was cloned and sequenced it encoded the 13a peptideinternally. Oligonucleotide 27R derived from the only available 84 kDpeptide sequence was used in an anchored PCR procedure amplifying a 405bp segment of DNA. This 405 bp amplified sequence was identical to analready sequenced region of the 91 kD protein. It was then realized thatthe peptide t27 sequence was contained within peptide t19 and that the91 and 84 kD proteins must be related (see FIG. 5 & 7). Oligonucleotides19F and 13a were also used to select candidate cDNA clones from a cDNAlibrary made from mRNA prepared after 16 hr. of IFN-γ and 45 min. ofIFN-α treatment.

Of the numerous cDNA clones that hybridized these oligonucleotides andalso the cloned PCR products, one cDNA clone, E4, contained the largestopen reading frame flanked by inframe stop codons. Sequence of peptidest19, t13a, and t13b were contained in this 2217 bp ORF (see FIG. 6)which was sufficient to encode a protein of 739 amino acids (calculatedmolecular weight of 86 kD). The codon for the indicated initialmethionine was preceded by three in frame stop codons. This codingcapacity has been confirmed by translating in vitro an RNA copy of theE4 clone yielding product of nominal size of 86 kD, somewhat shorterthan the in vitro purified 91 kD protein discussed earlier (data notshown). Perhaps this result indicates post-translational modification ofthe protein in the cell.

A second class of clones was also identified (see FIG. 5). E3, theprototype of this class was identical to E4 from the 5' end to bp 2286(aa 701) at which point the sequences diverged completely. Both cDNAsterminated with a poly(A) tail. Primer extension analysis suggestedanother ˜150 bp were missing from the 5' end of both mRNAs. DNA probeswere made from the clones representing both common and unique sequencesfor use in Northern blot analyses. The preparation of the probes is asfollows: 20 mg of cytoplasmic RNA (0.5% NP-40 lysate) of IFN-α treated(6 h) HeLa RNA was fractionated in a 1% agarose, 6% formaldehyde gel (in20 mM MOPS, 5 mM NaAc, 1 mM EDTA, pH 7.0) for 4.5 h at 125 volts. TheRNA was transferred in 20×SSC to Hybond-N (Amersham), UV crosslinked andhybridized with 1×106 cpm/ml of the indicated probes (1.5×10⁸ cpm/mg).

Probes from regions common to E3 and E4 hybridized to two RNA species ofapproximately 3.1 KB and 4.4 KB. Several probes derived from the 3'non-coding end of E4, which were unique to E4, hybridized only thelarger RNA species. A labeled DNA probe from the unique 3' non-codingend of E3 hybridized only the smaller RNA species.

Review of the sequence at the site of 3' discontinuity between E3 and E4suggested that the shorter mRNA results from choice of a differentpoly(A) site and 3' exon that begins at bp 2286 (the calculatedmolecular weight from the E3. The last two nucleotides before the changeare GT followed by GT in E3 in line with the consensus nucleotides at anexon-intron junction. Since the ORF of E4 extends to bp 2401 it encodesa protein that is 38 amino acids longer than the one encoded by E3, butis otherwise identical (ORF is 82 kD).

Since there is no direct assay for the activity of the 91 or 84 kDprotein, an independent method was needed to determine whether the cDNAclones we had isolated did indeed encode proteins that are part ofISGF-3. For this purpose antibodies were initially raised against thesequence from amino acid 597 to amino acid 703 (see FIG. 6) byexpressing this peptide in the pGEX-3X vector (15) as a bacterial fusionprotein. This antiserum (a42) specifically recognized the 91 kD and 84kD proteins in both crude extracts and purified ISGF-3 (see FIG. 7a).More importantly this antiserum specifically affected the ISGF-3 band ina mobility shift assay using the labeled ISRE oligonucleotide (see FIG.7b) confirming that the isolated 91 kD and 84 kD cDNA clones (E4 and E3)represent a component of ISGF-3. Additional antisera were raised againstthe amino terminus and carboxy terminus of the protein encoded by E4.The amino terminal 59 amino acids that are common to both proteins andthe unique carboxy terminal 34 amino acids encoded only by the largermRNA were expressed as fusion proteins in pGEX-3X for immunization ofrabbits. Western blot analysis with highly purified ISGF-3 demonstratedthat the amino terminal antibody (a55) recognized both the 91 kD and 84kD proteins as expected. However, the other antibody (a57) recognizedonly the 91 kD protein confirming our assumption that the larger mRNA(4.4 KB) and larger cDNA encodes the 91 kD protein while the shortermRNA (3.1 KB) and cDNA encodes the 84 kD protein (see FIG. 7a).

EXAMPLE 2

In this example, the cloning of the 113 kD protein that comprises one ofthe three ISGF-3α components is disclosed.

From SDS gels of highly purified ISGF-3, the 113 kD band was identified,excised and subjected to cleavage and peptide sequence analysis[Aebersold et al., PROC. NATL. ACAD. SCI. USA, 87 (1987)]. Five peptidesequences (A-E) were obtained (FIG. 8A). Degenerate oligonucleotideprobes were designed according to these peptides which then wereradiolabeled to search a human cDNA library for clones that might encodethe 113 kD protein. Eighteen positive cDNA clones were recovered from2.5×10⁵ phage plaques with the probe derived from peptide E (FIG. 8A,and the legend). Two of them were completely sequenced. Clone f11contained a 3.2 KB cDNA, and clone ka31 a 2.6 KB cDNA that overlappedabout 2 KB but which had a further extended 5' end in which a candidateAUG initiation codon was found associated with a well-conserved Kozaksequence [Kozak, NUCLEIC ACIDS RES., 12 (1984)].

In addition to the phage cDNA clones, a PCR product made betweenoligonucleotides that encoded peptide D and E also yielded a 474 NTfragment that when sequenced was identical with the cDNA clone in thisregion. A combination of these clones f11 and ka31 revealed an openreading frame capable of encoding a polypeptide of 851 amino acids (FIG.8A). These two clones were joined within their overlapping region andRNA transcribed from this recombinant clone was translated in vitroyielding a polypeptide that migrated in an SDS gel with a nominalmolecular weight of 105 kD (FIG. 9A). An appropriate clone encoding the91 kD protein was also transcribed and the RNA translated in the sameexperiment. Since both the apparently complete cDNA clones for the 113kD protein and the 91 kD protein produce RNAs that when translated intoproteins migrate somewhat faster than the proteins purified as ISGF-3components, it is possible that the proteins undergo post-translationalmodification in the cell causing them to be slightly retarded duringelectrophoresis. When a 660 bp cDNA encoding the most 3' end of the 113kD protein was used in a Northern analysis, a single 4.8 KB mRNA specieswas observed (FIG. 9B).

No independent assay is known for the activity of the 113 kD (or indeedany of the ISGF-3α proteins,) but it is known that the protein is partof a DNA binding complex that can be detected by an electrophoreticmobility shift assay [Fu et al., PROC. NATL. ACAD. SCI. USA, 87 (1990)].Antibodies to DNA binding proteins are known to affect the formation ormigration of such complexes. Therefore antiserum to a polypeptidesegment (amino acid residues 323 to 527) fused with bacterialglutathione synthetase [Smith et al., PROC. NATL. ACAD. SCI. USA, 83(1986)] was raised in rabbits to determine the reactivity of the ISGF-3proteins with the antibody. A Western blot analysis showed that theantiserum reacted predominantly with a 113 kD protein both in the ISGF3fraction purified by specific DNA affinity chromatography (Lane 1) andin crude cell extract (Lane 2, FIG. 10A). The weak reactivity to lowerprotein bands was possibly due to 113 kD protein degradation. Mostimportantly, the antiserum specifically removed almost all of thegel-shift complex leaving some of the oligonucleotide probe in"shifted-shift" complexes which were specifically competed away with a50 fold molar excess of the oligonucleotide binding site (the ISRE, ref.2) for ISGF3 (FIG. 10B). Notably, this antiserum had no effect on thefaster migrating shift band produced by ISGF3-γ component alone (FIG.10B). Thus it appeared that the antiserum to the 113 kD fusion productdoes indeed react with another protein that is part of the completeISGF-3 complex.

A detailed sequence comparison between the 113 and 91. sequencesfollowed (FIG. 8B): while the nucleotide sequence showed only a distantrelationship between the two proteins, there were long stretches ofamino acid identity. These conserved regions were scattered throughoutalmost the entire 715 amino acid length encoded by the 91/84 clone. Itwas particularly striking that the regions corresponding to amino acids1 to 48 and 317 to 353 and 654 to 678 in the 113 sequence were 60% to70% identical to corresponding regions of the 91 kD sequence. Thus thegenes encoding the 113 and 84/91 proteins are closely related but notidentical.

Through examination for possible consensus sequences that might revealsub-domain structures in the 113 kD or 84/91 kD sequence, it was foundthat both proteins contained regions whose sequence might form a coilstructure with heptad leucine repeats. This occurred between amino acid210 and 245 in the 113 kD protein and between 209 and 237 in the 84/91protein. In both the 113 kD and the 91/84 kD sequences, 4 out of 5possible heptad repeats were leucine and one was valine. Domains of thistype might provide a protein surface that encourages homo-or heterotypicprotein interactions which have been observed in several othertranscription factors [Vinson et al., SCIENCE, 246 (1989)]. An extendedacidic domain was located at the carboxyl terminal of the 113 kD proteinbut not in 91 kD protein (FIG. 8A), possibly implicating the 113 kDprotein in gene activation [Hope et al., Ma et al., CELL, 48 (1987)].

Discussion

When compared at moderate or high stringency to the Genbank and EMBLdata bases, there were no sequences like 113 or the 84/91 sequence.Preliminary PCR experiments however indicate that there are other familymembers with different sequences recoverable from a human cell cDNAlibrary (Qureshi and Darnell unpublished). Thus, it appears that the 113and 84/91 sequences may represent the first two members to be cloned ofa larger family of proteins. We would hypothesize that the 113 kD and84/91 kD proteins may act as signal transducers, somehow interactingwith the internal domain of a liganded IFNα receptor or its associatedprotein and further that a family of waiting cytoplasmic proteins existwhose purpose is to be specific signal transducers when differentreceptors are occupied. Many experiments lie ahead before this generalhypothesis can be crucially tested. Recent experiments have indicatedthat inhibitors of protein kinases can prevent ISGF-3 complexformulation [Reich et al., PROC. NATL. ACAD. SCI. USA, 87 (1990);Kessler et al., J. BIOL. CHEM., 266 (1991)].

However, neither the IFNα or IFNγ receptors that have so far been clonedhave intrinsic kinase activity [Uze et al., CELL, 60 (1990); Aguet etal., CELL, 55 (1988)]. We would speculate that either a second receptorchain with kinase activity or a separate kinase bound to a ligandedreceptor could be a part of a complex that would convey signals to theISGF-3α proteins at the inner surface of the plasma membrane.

From the above, it has been concluded that accurate peptide sequencefrom ISGF-3 protein components have been determined, leading to correctidentification of cDNA clones encoding the 113, 91 and 84 kD componentsof ISGF-3. Since staurosporine, a broadly effective kinase inhibitorblocks IFN-α induction of transcription and of ISGF-3 formation [Reichet al., PROC. NATL. ACAD. SCI. USA, 87 (1990); Kessler et al., J. BIOL.CHEM., 266 (1991)] it seems possible that the ISGF-3α proteins aredirect cytoplasmic substrates of a liganded receptor-associated kinase.The antiserum against these proteins should prove invaluable inidentifying the state of the ISGF-3α proteins before and after IFNtreatment and will allow the direct exploration of the biochemistry ofsignal transduction from the IFN receptor.

EXAMPLE 3

As mentioned earlier, the observation and conclusion underlying thepresent invention were crystallized from a consideration of the resultsof certain investigations with particular stimuli. Particularly, thepresent disclosure is illustrated by the results of work on proteinfactors that govern transcriptional control of IFNα-stimulated genes, aswell as more recent data on the regulation of transcription of genesstimulated by IFN-γ.

For example, there is evidence that the 91 kD protein is the tyrosinekinase target when IFNγ is the ligand. Thus two different ligands actingthrough two different receptors both use these family members. With onlya modest number of family members and combinatorial use in response todifferent ligands, this family of proteins becomes an even more likelypossibility to represent a general link between ligand-occupiedreceptors and transcriptional control of specific genes in the nucleus.

Further study of the 113, 91 and 84 kD proteins of the present inventionhas revealed that they are phosphorylated in response to treatment ofcells with IFNα (FIG. 11). Moreover, when the phosphoamino acid isdetermined in the newly phosphorylated protein the amino acid has beenfound to be tyrosine (FIG. 12). This phosphorylation has been observedto disappear after several hours, indicating action of a phosphatase ofthe 113, 91 and 84 kD proteins to stop transcription. These results showthat IFN dependent transcription very likely demands this particularphosphorylation and a cycle of interferon-dependentphosphorylation-dephosphorylation is responsible for controllingtranscription.

It is proposed that other members of the 113-91 protein family will beidentified as phosphorylation targets in response to other ligands. Ifas is believed, the tyrosine phosphorylation site on proteins in thisfamily is conserved, one can then easily determine which family membersare activated (phosphorylated), and likewise the particularextracellular polypeptide ligand to which that family member isresponding. The modifications of these proteins (phosphorylation anddephosphorylation) enables the preparation and use of assays fordetermining the effectiveness of pharmaceuticals in potentiating orpreventing intracellular responses to various polypeptides, and suchassays are accordingly contemplated within the scope of the presentinvention.

EXAMPLE 4

Identification of Murine 91 kD Protein

A fragment of the gene encoding the human 91 kD protein was used toscreen a murine thymus and spleen cDNA library for homologous proteins.The screening assay yielded a highly homologous gene encoding a murinepolypeptide that is greater than 95% homologous to the human 91 EDprotein. The nucleic acid and deduced amino acid sequence of the murine91 kD protein are shown in FIGS. 13A-13C, and SEQ ID NO:7 (nucleotidesequence) and SEQ ID NO:8 (amino acid sequence).

EXAMPLE 5

Additional Members of the 113-91 Protein Family

Using a 300 nuclide fragment amplified by PCR from the SH2 region of themurine 91 kD protein gene, murine genes encoding two additional membersof the 113-91 family of receptor recognition factor proteins wereisolated from a murine splenic/thymic cDNA library according to themethod of Sambrook et al. (1989, Molecular Cloning, A Laboratory Manual,2nd. ed., Cold Spring Harbor Press: Cold Spring Harbor, N.Y.)constructed in the ZAP vector. Hybridization was carried out at 42° C.and washed at 42° C. before the first exposure (Church and Gilbert,1984, Proc. Natl. Acad. Sci. USA 81:1991-95). Then the filters werewashed in 2×SSC, 0.1% SDS at 65° C. for a second exposure. Stat1 clonessurvived the 65° C. washing, whereas Stat3 and Stat4 clones wereidentified as plaques that lost signals at 65° C. The plaques werepurified and subcloned according to Stratagene commercial protocols.

This probe was chosen to screen for other STAT family members because,while Stat1 and Stat2 SH2 domains are quite similar over the entire 100to 120 amino acid region, only the amino terminal half of the STAT SH2domains strongly resemble the SH2 regions found in other proteins.

The two genes have been cloned into plasmids 13sf1 and 19sf6. Thenucleotide sequence, and deduced amino acid sequence, for the 13sf1 and19sf6 genes are shown in FIGS. 14 and 15, respectively. These proteinsare alternatively termed Stat4 and Stat3, respectively.

Comparison with the sequence of Stat91 (Stat1) and Stat113 (Stat) showsseveral highly conserved regions, including the putative SH3 and SH2domains. The conserved amino acid stretches likely point to conserveddomains that enable these proteins to carry out transcription activationfunctions. Stat3, like Stat1 (Stat91), is widely expressed, while Stat4expression is limited to the testes, thymus, and spleen. Stat3 has beenfound to be activated as a DNA binding protein through phosphorylationon tyrosine in cells treated with EGF or IL-6, but not after IFNγ,treatment.

Both the 13sf1 and 19sf6 genes share a significant homology with thegenes encoding the human and murine 91 kD protein. There iscorresponding homology between the deduced amino acid sequences of the13sf1 and 19sf6 proteins and the amino acid sequences of the human andmurine 91 kD proteins, although not the greater than 95% amino acidhomology that is found between the murine and human 91 kD proteins.Thus, though clearly of the same family as the 91 kD protein, the 13sf1and 19sf6 genes encode distinct proteins.

The chromosomal locations of the murine STAT proteins (1-4) have beendetermined: Stat1 and Stat4 are located in the centromeric region ofmouse chromosome 1 (corresponding to human 2q 32-34q); the two othergenes are on other chromosomes.

Southern analysis using probes derived from 13sf1 and 19sf6 on humangenomic libraries have established that genes corresponding to themurine 13sf1 and 19sf6 genes are found in humans.

Tissue distribution of mRNA expression of these genes was evaluated byNorthern hybridization analysis. The results of this distributionanalysis are shown in the following Table.

                  TABLE                                                           ______________________________________                                        DISTRIBUTION OF mRNA EXPRESSION OF 13sf1, 19sf6, 91 kD                          PROTEINS                                                                        ORGAN          13sf1      19sf6  91 KD                                    ______________________________________                                        BRAIN          -          +        -                                            HEART - +++ -                                                                 KIDNEY - - -                                                                  LIVER - + +                                                                   LUNG - - -                                                                    SPLEEN + + ++++                                                               TESTIS ++++ ++ N.A.                                                           THYMUS ++ ++ +++                                                              EMBRYO (16d) not found found found                                          ______________________________________                                    

Northern analysis demonstrates that there is variation in the tissuedistribution of expression of the mRNAs encoded by these genes. Thevariation and tissue distribution indicates that the specific genesencode proteins that are responsive to different factors, as would beexpected in accordance with the present invention. The actual ligand,the binding of which induces phosphorylation of the newly discoveredfactors, will be readily determinable based on the tissue distributionevidence described above.

To determine whether the Stat3 and Stat4 proteins were present in cells,protein blots were carried out with antisera against each protein. Theantisera were obtained by subcloning amino acids 688 to 727 of Stat3 and678 to 743 of Stat4 to pGEX1λt (Pharmacia) by PCR with oligonucleotidesbased on the boundary sequence plus restriction sites (BamHI at the 5'end and EcoRI at the 3' end), allowing for in-frame fusion with GST. Onemilligram of each antigen was used for the immunization and threebooster injections were given 4 weeks apart. Anti-Stat3 and anti-Stat4sera were used 1:1000 in Western blots using standard protocols. Toavoid cross reactivity of the antisera, antibodies were raised againstthe C-terminal of Stat3 and Stat4, the less homologous region of theprotein.

These proteins were unambiguously found in several tissues where themRNA wan known to be present. Protein expression was checked in severalcell lines as well. A protein of 89 kD reactive with Stat4 antiserum wasexpressed in 70Z cells, a preB cell line, but not in many other celllines. Stat3 was highly expressed, predominantly as a 97 kD protein, in70Z, HT2 (a mouse helper T cell clone), and U937 (a macrophage-derivedcell).

To prove that the full length functional cDNA clones of Stat3 and Stat4were obtained, the open reading frames of each cDNA was independently(i.e., separately) cloned into the Rc/CMV expression vector (Invitrogen)downstream of a CMV promoter. The resulting plasmids were transfectedinto COS1 cells and proteins were extracted 60 hrs post-transfection andexamined by Western blot after electrophoresis. Untransfected COS1 cellsexpressed a low level of 97 kD Stat3 protein but did not express adetectable level of Stat4. Upon transfection of the Stat3-expressingplasmid, the 97 kD Stat3 was increased at least 10-fold. And 89 kDprotein antigenically related to Stat3, found as a minor band in mostcell line extracts, was also increased post-transfection. This proteintherefore appears to represent another form of Stat3 protein, or anantigenically similar protein whose synthesis is stimulated by Stat3.Transfection with Stat4 led to the expression of a 89 kD reactive bandindistinguishable in size form the p89 Stat4 found in 70Z cell extracts.

Discussion

As mentioned earlier, the observation and conclusion underlying thepresent invention were crystallized from a consideration of the resultsof certain investigations with particular stimuli. Particularly, thepresent disclosure is illustrated by the results of work on proteinfactors that govern transcriptional control of IFNα-stimulated genes, aswell as more recent data on the regulation of transcription of genesstimulated by IFNγ. The present disclosure is further illustrated by theidentification of related genes encoding protein factors responsive toas yet unknown factors. It is expected that the murine 91 kD protein isresponsive to IFN-γ.

For example, the above represents evidence that the 91 kD protein is thetyrosine kinase target when IFNγ is the ligand. Thus two differentligands acting through two different receptors both use these familymembers. With only a modest number of family members and combinatorialuse in response to different ligands, this family of proteins becomes aneven more likely possibility to represent a general link betweenligand-occupied receptors and transcriptional control of specific genesin the nucleus.

It is proposed and shown by the foregoing that other members of the113-91 protein family will be and have been identified asphosphorylation targets in response to other ligands. If as is believed,the tyrosine phosphorylation site on proteins in this family isconserved, one can then easily determine which family members areactivated (phosphorylated), and likewise the particular extracellularpolypeptide ligand to which that family member is responding. Themodifications of these proteins (phosphorylation and dephosphorylation)enables the preparation and use of assays for determining theeffectiveness of pharmaceuticals in potentiating or preventingintracellular responses to various polypeptides, and such assays areaccordingly contemplated within the scope of the present invention.

Earlier work has concluded that DNA binding protein was activated in thecell cytoplasm in response to IFN-γ treatment and that this proteinstimulated transcription of the GBP gene (10,14). In the present work,with the aid of antisera to proteins originally studied in connectionwith IFN-α gene stimulation (7,12,15), the 91 kD ISGF-3 protein has beenassigned a prominent role in IFN-γ gene stimulation as well. Theevidence for this conclusion included: 1) antisera specific to the 91 kDprotein affected the IFN-γ dependent gel-shift complex, and 2) A 91 kDprotein could be cross-linked to the GAS IFN-γ activated site. 3) A ³⁵S-labeled 91 kD protein and a 91 kD immunoreactive protein specificallypurified with the gel-shift complex. 4) The 91 kD protein is an IFN-γdependent tyrosine kinase substrate as indeed it had earlier proved tobe in response to IFN-α (15). 5) The 91 kD protein but not the 113 kDprotein moved to the nucleus in response to IFN-γ treatment. None ofthese experiments prove but do strongly suggest that the same 91 kDprotein acts differently in different DNA binding complexes that aretriggered by either IFN-α or IFN-γ.

These results strongly support the hypothesis originated from studies onIFN-α that polypeptide cell surface receptors report their occupation byextracellular ligand to latent cytoplasmic proteins that afteractivation move to the nucleus to trigger transcription (4,15,21).Furthermore, because cytoplasmic phosphorylation and factor activationis so rapid it appears likely that the functional receptor complexescontain tyrosine kinase activity. Since the IFN-γ receptor chain thathas been cloned thus far (22) has no hint of possessing intrinsic kinaseactivity, perhaps some other molecule with tyrosine kinase activitycouples with the IFN-γ receptor. Two recent results with other receptorssuggest possible parallels to the situation with the IFN receptors. Thetrk protein which has an intracellular tyrosine kinase domain,associates with the NGF receptor when that receptor is occupied (23). Inaddition, the lck protein, a member of the src family of tyrosinekinases, is co-precipitated with the T cell receptor (24). It ispossible to predict that signal transduction to the nucleus throughthese two receptors could involve latent cytoplasmic substrates thatform part of activated transcription factors. In any vent, it seemspossible that there are kinases like trk or lck associated with theIFN-γ receptor or with IFN-α receptor.

With regard to the effect of phosphorylation on the 91 kD protein, itwas something of a surprise that after IFN-γ treatment the 91 kD proteinbecomes a DNA binding protein. Its role must be different in response toIFN-α treatment. Tyrosine is also phosphorylated on tyrosine and joins acomplex with the 113 and 84 kD proteins but as judged by UVcross-linking studies (7), the 91 kD protein does not contact DNA.

In addition to becoming a DNA binding protein it is clear that the 91 kDprotein is specifically translocated the nucleus in the wake of IFN-γstimulation.

EXAMPLE 6 Dimerization of Phosphorylated Stat91

Stat91 (a 91 kD protein that acts as a signal transducer and activatorof transcription) is inactive in the cytoplasm of untreated cells but isactivated by phosphorylation on tyrosine in response to a number ofpolypeptide ligands including IFN-α and IFN-γ. This example reports thatinactive Stat91 in the cytoplasm of untreated cells is a monomer andupon IFN-γ induced phosphorylation it forms a stable homodimer. Thedimer is capable of binding to a specific DNA sequence directingtranscription. Dissociation and reassociation assays show thatdimerization of Stat91 is mediated through SH2-phosphotyrosyl peptideinteractions. Dimerization involving SH2 recognition of specificphosphotyrosyl peptides may well provide a prototype for interactionsamong family members of STAT proteins to form different transcriptioncomplexes and Jak2 for the IFN-γ pathway (42, 43, 44). These kinasesthemselves become tyrosine phosphorylated to carry out specificsignaling events.

Materials and Methods

Cell Culture. Human 2fTGH, U3A cells were maintained in DMEM mediumsupplied with 10% bovine calf serum. U3A cell lines supplemented withvarious Stat91 protein constructs were maintained in 0.1 mg/ml G418(Gibco, BRL).

Stable cell lines were selected as described (45). IFN-γ(5 ng/ml, giftfrom Amgen) treatment of cells was for 15 min. unless otherwise noted.

Plasmid Constructions. Expression construct MNC-84 was made by insertionof the cDNA into the Not I-Bam HI cloning site of an expression vectorPMNC (45, 35). MNC-91L was made by insertion of the Stat91 cDNA into theNot I-Bam HI cloning sites of pMNC without the stop codon at the end,resulting the production of a long form of Stat91 with a C-terminal tagof 34 amino acids encoded by PMNC vector.

GST fusion protein expression plasmids were constructed by the using thepGEX-2T vector (Pharmacia). GST-91SH2 encodes amino acids 573 to 672 ofStat91; GST-91mSH2 encodes amino acids 573 to 672 of Stat91 with anArg-602->Leu-602 mutation; and GST-91SH3 encodes amino acids 506 to 564of Stat91.

DNA Transfection. DNA transfection was carried by the calcium phosphatemethod, and stable cell lines were selected in Dulbecco's modifiedEagle's medium containing G418 (0.5 mg/ml, Gibco), as described (45).

Preparation of Cell Extracts. Crude whole cell extracts were prepared asdescribed (31). Cytoplasmic and nuclear extracts were preparedessentially as described (46).

Affinity Punfication. Affinity purification with a biotinylatedoligonucleotide was described (31). The sequence of the biotinylated GASoligonucleotide was from the Ly6E gene promoter (34).

Nondenaturing Polyacrylamide Gel Analysis. A nondenatured proteinmolecular weight marker kit with a range of molecular weights from 14 to545 kD was obtained from Sigma. Determining molecular weights usingnondenaturing polyacrylamide gel was carried out following themanufacturer's procedure, which is a modification of the methods ofBryan and Davis (47, 48). Phosphorylated and unphosphorylated Stat91samples obtained from affinity purification using a biotinylated GASoligonucleotide (31) were resuspended in a buffer containing 10 mM Tris(pH 6.7), 16% glycerol, 0.04% bromphenol blue (BPB). The mixtures wereanalyzed on 4.5%, 5.5%, 6.5%, and 7.5.% native gels side by side withstandard markers using a Bio-Rad mini-Protean II Cell electrophoresissystem. Electrophoresis was stopped when the dye (BPB) reached thebottom of the gels. The molecular size markers were revealed byCoomassie blue staining. Phosphorylated and unphosphorylated Stat91samples were detected by immunoblotting with anti-91T.

Glycerol Gradient Analysis. Cells extracts (Bud 8) were mixed withprotein standards (Pharmacia) and subjected to centrifugation throughpreformed 10%-40% glycerol gradients for 40 hours at 40,000 rpm in anSW41 rotor as described (6).

Gel Mobility Shift Assays. Gel mobility shift assays were carried out asdescribed (34). An oligonucleotide corresponding to the GAS element fromthe human FcγRI receptor gene (Pearse et al. 1993) was synthesized andused for gel mobility shift assays. The oligonucleotide has thefollowing sequence: 5' GATCGAGATGTAMTTCCCAGAAAAG3' (SEQ. ID NO:17).

Synthesis of Peptides. Solid phase peptide synthesis was used witheither a DuPont RAMPS multiple synthesizer or by manual synthesis.C-terminal amino attached to Wang resin were obtained from DuPont/NEN.All amino acids were coupled as the N-Fmoc pentafluorophenyl esters(Advanced Chemtech), except for N-Fmoc, PO-dimethyl-L-phosphotyrosine(Bachem). Double couplings were used. Cleavage from resin anddeprotection used thioanisol/m-cresol/TFA/TMSBr at 4° C. for 16 hr.Purification used C-18 column HPLC with 0.1% TFA/acetonitrile gradients.Peptides were characterized by ¹ H and ³¹ P NMR, and by Mass Spec, andwere greater than 95% pure.

Guanidium Hydrochloride Treatment. Extracts were incubated withguanidium hydrochloride (final concentration was 0.4 to 0.6 M) for twomin. at room temperature and then diluted with gel shift buffer (finalconcentration of guanidium hydrochloride was 100 mM) and incubated atroom temperature for 15 min. ³² P-labeled GAS oligonucleotide probe wasthen added directly to the mixture followed by gel mobility shift assay.

Dissociation-reassociation Analysis. Extracts were incubated withvarious concentrations of peptides or fusion proteins, and ³² P-labeledGAS oligonucleotide probe in gel shift buffer was then added to promotethe formation of protein-DNA complex followed by mobility shiftanalysis. This assay did not involve guanidium hydrochloride treatment.

Preparation of Fusion Proteins. Bacterially expressed GST fusionproteins were purified using standard techniques, as described in Birgeet al., 1992. Fusion proteins were quantified by O.D. absorbance at 280nm. Aliquotes were frozen at -70° C.

Results

Detection of Ligand Induced Dimer Formation of Stat91 in Solution. Inuntreated cells, Stat91 is not phosphorylated on tyrosine. Treatmentwith IFN-γ leads within minutes to tyrosine phosphorylation andactivation of DNA binding capacity. The phosphorylated form migratesmore slowly during electrophoresis under denaturing conditions affordinga simple assay for the phosphoprotein (31).

To determine the native molecular weights of the phosphorylated andunphosphorylated forms of Stat91, we separated them by affinitypurification using a biotinylated deoxyoligonucleotide containing a GASsequence (interferon gamma activation site) (FIG. 16A). The separationof phosphorylated Stat91 from the unphosphorylated form was efficient asalmost all detectable phosphorylated form could bind to the GAS sitewhile unphosphorylated Stat91 remained unbound. To determine themolecular weights of the purified phosphorylated Stat91 andunphosphorylated Stat91, samples of each were then subjected toelectrophoresis through a set of nondenaturing gels containing variousconcentrations of acrylamide followed by Western blot analysis (FIG.16B). Native protein size markers (Sigma) were included in the analysis.

This technique was originally described by Bryan (48) and was recentlyused for dimer analysis (49). The logic of the technique is thatincreasing gel concentrations affect the migration of larger proteinsmore than smaller proteins, and the analysis is not affected bymodifications such as protein phosphorylation (49).

A function of the relative mobilities (Rm) was plotted versus theconcentration of acrylamide for each sample to construct Ferguson plots(FIG. 16C). The logarithm of the retardation coefficient (calculatedfrom FIG. 16C) of each sample was then plotted against the logarithm ofthe relevant molecular weight range (FIG. 16D). By extrapolation of itsretardation coefficient (FIG. 16D), the native molecular weight ofStat91 from untreated cells was estimated to be approximately 95 kD,while tyrosine phosphorylated Stat91 was estimated to be about twice aslarge, or approximately 180 kD. Because the calculated molecular weightfrom amino acid sequence of Stat91 is 87 kD, and Stat91 migrates ondenaturing SDA gels with an apparent molecular weight of 91 kD (seesupra, and refs. 12 and 45), we concluded that in solution,unphosphorylated Stat91 existed as a monomer while tyrosinephosphorylated Stat91 is a dimer.

We also employed glycerol gradient analysis to estimate the nativemolecular weights of both phosphorylated and unphosphorylated Stat91(FIG. 17). Whole cell extract of fibroblast cells (Bud8) treated withIFN-γ were prepared and subjected to sedimentation through a 10-40%glycerol gradient. Fractions from the gradient were collected andanalyzed by both immunoblotting and gel mobility shift analysis (FIG.17A and 17B). As expected, two electrophoretic forms of Stat91 could bedetected by immunoblotting (FIG. 17A): the slow-migrating form (tyrosinephosphorylated) and the fast-migrating form (unphosphorylated; FIG.17A). The phosphorylated Stat91 sedimented more rapidly than theunphosphorylated form. Again, using molecular weight markers, the nativemolecular weight of the unphosphorylated form of Stat91 appeared to beabout 90 kD while the tyrosine phosphorylated form of Stat91 was about180kD (FIG. 17C), supporting the conclusion that unphosphorylated Stat91existed as a monomer in solution while the tyrosine phosphorylated formexists as a dimer. When fractions from the glycerol gradients wereanalyzed by electrophoretic mobility shift analysis (FIG. 17B), the peakof the phosphorylated form of Stat91 correlated well with theDNA-binding activity of Stat91. Thus only the phosphorylated dimericStat91 has the sequence-specific DNA recognition capacity.

Stat91 Binds DNA as a Dimer. Long or short versions of DNA bindingprotein can produce, respectively, a slower or a faster migrating bandduring gel retardation assays. Finding intermediate gel shift bandsproduced by mixing two different sized species provides evidence ofdimerization of the DNA binding proteins. Since Stat91 requires specifictyrosine phosphorylation in ligand-treated cells for its DNA binding, wesought evidence of formation of such heterodimers, first in transfectedcells. An expression vector (MNC911) encoding Stat91L, a recombinantform of Stat91 containing an additional 34 amino acid carboxyl terminaltag was generated. [The extra amino acids were encoded by a segment ofDNA sequence from plasmid pMNC (see Materials and Methods).] A Stat84expression vector (MNC84) was also available (45). From somatic cellgenetic experiments, mutant human cell lines (U3) are known that lackthe Stat91/84 mRNA and proteins (29,30). The U3 cells were thereforeseparately transfected with vectors encoding Stat84 (MNC84) or Stat91L(MNC91L) or a mixture of both vectors. Permanent transfectantsexpressing Stat84 (C84), Stat91L (C91L) or both proteins (Cmx) wereisolated (FIG. 18A).

Mobility shift analysis was performed with extracts from these stablecell lines (FIG. 18B). Extracts of IFN-γ-treated C84 cells produced afaster migrating gel shift band than extracts of treated C91L cells.Most importantly, extracts from IFN-γ-treated Cmx cells expressing bothStat84 and Stat91L proteins formed an additional intermediate gel shiftband. Anti-91, an antiserum against the C-terminal 38 amino acids ofStat91 (12) that are absent in Stat84, specifically removed the top twoshift bands seen with the Cmx extracts. Anti-91, an antiserum againstamino acids 609 to 716 (15) that recognizes both Stat91L and Stat84,proteins inhibited the binding of all three shift bands. Thus, themiddle band formed by extracts of the Cmx cells is clearly identified asa heterodimer of Stat84 and Stat91L. We concluded that both Stat91 andStat84 bind DNA as homodimers and, if present in the same cell, willform heterodimers.

We next wanted to detect the formation of dimers in vitro. Whencytoplasmic or nuclear extracts of IFN-γ-treated C84 or C91L cells weremixed and analyzed (FIG. 19), only the fast or slow migrating gel shiftbands were observed. Thus it appeared that once formed in vivo, thedimers were stable. To promote the formation of protein interchangebetween the subunits of the dimer, a mixture of either cytoplasmic ornuclear extracts of IFN-γ-treated C84 or C91L cells were subjected milddenaturation-renaturation treatment: extracts were made 0.5 M withrespect to guanidium hydrochloride for two minutes and then diluted forrenaturation and subsequently used for gel retardation analysis. Theformation of heterodimer was clearly detected after this treatment. Whenextracts from either C84 cells alone or C91L cells alone were subjectedto the same treatment, the intermediate band did not form. Theintermediate band was again proven by antiserum treatment to consist ofStat84/Stat91L dimer (data not shown).

This experiment defined conditions under which the dimer was stable, butalso showed that dissociation and reassociation of the dimer in vitrowas possible. Since guanidium hydrochloride is known to disrupt onlynon-covalent chemical bonds, it seemed that Stat91 (or Stat84)homodimerization was mediated through non-covalent interactions.

Dimerization of Stat91 Involves Phosphotyrosyl Peptide and SH2Interactions. Based on the results described above, we devised adissociation-reassociation assay in the absence of guanidiumhydrochloride to explore the possible nature of interactions involved indimer formation (FIG. 20). When the short and the long forms of ahomodimer are mixed with a dissociating agent (e.g., a peptidecontaining the putative dimerization domain), the subunits of the dimershould dissociate (in a concentration dependent fashion) due to theinteraction of the agent with the dimerization domain(s) of the protein.When a specific DNA probe is subsequently added to the mixture to drivethe formation of a stable protein-DNA complex, the detection of anyreassociated or remaining dimers can be assayed. In the presence of lowconcentration of the dissociating agent, addition of DNA to form thestable protein-DNA complex should lead to the detection of homodimers aswell as heterodimers. At high concentration of the dissociating agent,subunits of the dimer may not be able to re-form and no DNA-proteincomplexes would be detected (FIG. 20).

The Stat91 sequence contains an SH2 domain (amino acids 569 to 700, seediscussion below), and we knew that Tyr-701 was the singlephosphorylated tyrosine residue required for DNA binding activity(supra, 45). Furthermore, we have observed that phosphotyrosine at 10mM, but not phosphoserine or phosphothreonine, could prevent theformation of Stat91 -DNA complex. We therefore sought evidence that thedimerization of Stat91 involved specific SH2-phosphotyrosine interactionusing the dissociation and reassociation assay.

In order to evaluate the role of the SH2-phosphotyrosine interation, twopeptides fragments of Stat91 corresponding to segments of the SH2 andphosphotyrosing domains of Stat91 were prepared: a non-phosphorylatedpeptide (91Y), LDGPKGTGYIKTELI (SEQ. ID NO:18) (corresponding to aminoacids 693-707), and a phosphotyrosyl peptide (91Y-p), GY*IKTE (SEQ. IDNO:19) (representing residues 700-705).

Activated Stat84 or Stat91L was obtained from IFN-γ-treated C84 or C91Lcells and mixed in the presence of various concentrations of thepeptides followed by gel mobility shift analysis. The non-phosphorylatedpeptide had no effect on the presence of the two gel shift bandscharacteristic of Stat84 or Stat91L homodimers (FIG. 21, lane 2-4). Incontrast, the phosphorylated peptide (91Y-p) at the concentration of 4μM clearly promoted the exchange between the subunits of Stat84 dimersand Stat91L dimers to form heterodimers (FIG. 21, lane 5). At a higherconcentration (160 μM), peptide 91Y-p but not the unphosphorylatedpeptide dissociated the dimers and blocked the formation of DNA proteincomplexes (FIG. 21, lane 7).

When cells are treated with IFN-α both Stat91 (or 84) and Stat113 becomephosphorylated (15). Antiserum to Stat113 can precipitate both Stat113and Stat91 after IFN-α-treatment but not before, suggesting IFN-αdependent interaction of these two proteins, perhaps as a heterodimer(15).

In Stat113, tyr-690 in the homologous position to Tyr-701 in Stat91 isthe single target residue for phosphorylation. Amino acids downstream ofthe affected tyrosine residue show some homology between the twoproteins. We therefore prepared a phosphotyrosyl peptide of Stat113(113Y-p), KVNLQERRKY*LKHR (SEQ. ID NO:20) [amino acids 681 to 694;(38)]. At concentrations similar to 91Y-p, 113Y-p also promoted theexchange of subunits between the Stat84 and Stat91L, while at a highconcentration (40 μM), 113Y-p prevented the gel shift bands almostcompletely (FIG. 21, lane 8-10).

We prepared a phosphotyrosyl peptide (SrcY-p), EPQY*EEIPIYL (SEQ. IDNO:21) which is known to interact with the Src SH2 domain with a highaffinity (50). This peptide showed no effect on the Stat91 dimerformation (FIG. 21, lane 11-13). Thus, it seems that Stat91 dimerizationinvolves SH2 interaction with tyrosine residues in specific peptidesequence.

To test further the specificity of Stat91 dimerization mediated throughspecific-phosphotyrosyl-peptide SH2 interaction, a fusion product ofglutathione-S-transferase with the Stat91 -SH2 domain (GST-91SH2) wasprepared (FIG. 22A) and used in the in vitro dissociation reassociationassay. At concentrations of 0.5 to 5 μM, the Stat91-SH2 domain promotedthe formation of a heterodimer (FIG. 22B, lanes 5-7). In contrast,neither GST alone, nor fusion products with a mutant (R⁶⁰² >L⁶⁰²)Stat91-SH2 domain (GST 91mSH2) that renders Stat91 non-functional invivo, a Stat91 SH3 domain (GST-91SH3), nor the Src SH2 domain(GST-SrcSH2), induced the exchange of subunits between the Stat84 andStat91 L homodimers (FIG. 22B).

Discussion

The initial sequence analysis of the Stat91 and Stat113 proteinsrevealed the presence of SH2 like domains (see 13,38). Further it wasfound that STAT proteins themselves are phosphorylated on singletyrosine residues during their activation (15,31). Single amino acidmutations either removing the Stat91 phosphorylation site, Tyr-701, orconverting Arg-702 to Leu in the highly conserved "pocket" region of theSH2 domain abolished the activity of Stat91 (45). Thus it seemed highlylikely that one possible role of the STAT SH2 domains would be to bindthe phosphotyrosine residues in one of the JAK kinases.

Since the activated STATs have phosphotyrosine residues and SH2 domains,a second suggested role for SH2 domains was in protein-proteininteractions within the STAT family. By two physicalcriteria--electrophoresis in native gels and sedimentation ongradients--Stat91 in untreated cells is a monomer and in treated cellsis a dimer (FIGS. 16-18). Since phosphotyrosyl peptides from Stat91 orStat113 and the SH2 domain of Stat91 could efficiently promote theformation of herterodimers between Stat91L and Stat84 in adisassociation and reassociation assay, we conclude that dimerization ofStat91 involves SH2-phosphotyrosyl peptide interactions.

The possibility of an SH2 domain in Stat91 was indicated initially bythe presence of highly conserved amino acid stretches between the Stat91and Stat113 sequences in the 569 to 700 residue region, several ofwhich, especially the FLLR sequence in the amino terminal end of theregion, are characteristic of --SH2 domains. The C-terminal half of theSH2 domains are less well conserved in general (39); this was also truefor the STAT proteins compared to other proteins, although Stat91 andStat113 are quite similar in this region (38, 13, FIG. 23). Theavailable structures of lck, src, abl, and p85a SH2's permitidentification of structurally conserved regions (SCR's), and detailedalignment of amino acid sequences of several proteins (FIG. 23) is basedon these.

The characteristic W (in βA1) is preceded by hydrophilic residues and isfollowed by hydrophobic residues in Stat91, but alignment to the W seemsjustified, even if the small beta sheet of which the W is part isshifted in Stat91. The three positively charged residues contributing tothe phosphotyrosyl binding site are at the positions indicated asalphaA2, betaB5, and betaD5. FIG. 23 shows an alignment whichaccomplishes this by insertions in the `AA` and `CD` regions. This is adifferent alignment from that previously suggested (38), and gives asatisfactory alignment in the (beta)D region, although, like theprevious alignment, it is obviously considerably less similar to theother SH2's in the C-terminus.

This alignment suggests that the SH2 domain in the Stat91 would end inthe vicinity of residue 700. In such an alignment, the Tyr-701 occursalmost immediately after the SH2 domain: a distance too short to allowan intramolecular phosphotyrosine--SH2 interaction. Since the datapresented earlier strongly implicate that an SH2-phosphotyrosineinteraction is involved in dimerization, such an interaction is likelyto be between two phospho Stat91 subunits as a reciprocal pTyr--SH2interaction.

The apparent stability of Stat91 dimer may be due to a high associationrate coupled with a high dissociation rate of SH2-phosphotyrosyl peptideinteractions as suggested (Felder et al., 1993, Mol. Cell Biol.13:1449-1455) coupled with interactions between other domains of Stat91that may contribute stability to the Stat91 dimer. Interference byhomologous phosphopeptides with the--SH2-phosphotyrosine interactionwould then lower stability sufficiently to allow complete dissociationand heterodimerization.

The dimer formation between phospho Stat91 is the first case ineukaryotes where dimer formation is regulated by phosphorylation, andthe only one thus far dependent on tyrosine phosphorylation. Weanticipate that dimerization with the STAT protein family will beimportant. It seems likely that in cells treated with IFN-α, there isStat113-Stat91 interaction (15). This may well be mediated through SH2and phosphotyrosyl peptide interactions as described above, leading to acomplex (a probable dimer of Stat91-Stat113) which joins with a 48 kDDNA binding protein (a member of another family of DNA binding factors)to make a complex capable of binding to a different DNA site.Furthermore, we have recently cloned two mouse cDNAs which encode otherSTAT family members that have conserved the same general structurefeatures observed in the Stat91 and Stat113 molecules (see Example 5,Supra). (U.S. application Ser. No. 08/126,588, filed Sep. 29, 1993,which is specifically incorporated herein by reference in its entirety).Thus the specificity of STAT-containing complexes will almost surely beaffected by which proteins are phosphorylated and then available fordimer formation.

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37. Brasier, A. R., Tata, J. E., and Habener, J. F. (1989).Biotechniques 7:1116.

38. Fu, X.-Y. (1992). Cell 70:323-335.

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43. Muller et al. (1993). Nature 366:129-135.

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45. Shuai, K., Stark, G. R., Kerr, I. M., and Darnell, J. E. (1993).Science 261:1744.

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49. Amster-Choder, O. and Wright, A. (1992). Science 257:1395.

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This invention may be embodied in other forms or carried out in otherways without departing from the spirit or essential characteristicsthereof. The present disclosure is therefore to be considered as in allrespects illustrative and not restrictive, the scope of the inventionbeing indicated by the appended claims, and all changes which comewithin the meaning and range of equivalency are intended to be embracedtherein.

    __________________________________________________________________________    #             SEQUENCE LISTING                                                   - -  - - (1) GENERAL INFORMATION:                                             - -    (iii) NUMBER OF SEQUENCES: 25                                          - -  - - (2) INFORMATION FOR SEQ ID NO:1:                                     - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 3268 base - #pairs                                                (B) TYPE: nucleic acid                                                        (C) STRANDEDNESS: both                                                        (D) TOPOLOGY: unknown                                                - -     (ii) MOLECULE TYPE: cDNA                                              - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -     (vi) ORIGINAL SOURCE:                                                          (A) ORGANISM: Homo sapi - #ens                                       - -    (vii) IMMEDIATE SOURCE:                                                         (B) CLONE: HeLa                                                      - -     (ix) FEATURE:                                                                  (A) NAME/KEY: CDS                                                             (B) LOCATION: 25..2577                                               - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:1:                        - - ACTGCAACCC TAATCAGAGC CCAA ATG GCG CAG TGG GAA A - #TG CTG CAG AAT            51                                                                                        - #         Met Ala Gln Trp Glu - #Met Leu Gln Asn                            - #           1       - #        5                           - - CTT GAC AGC CCC TTT CAG GAT CAG CTG CAC CA - #G CTT TAC TCG CAC AGC           99                                                                       Leu Asp Ser Pro Phe Gln Asp Gln Leu His Gl - #n Leu Tyr Ser His Ser            10                 - # 15                 - # 20                 - # 25       - - CTC CTG CCT GTG GAC ATT CGA CAG TAC TTG GC - #T GTC TGG ATT GAA GAC          147                                                                       Leu Leu Pro Val Asp Ile Arg Gln Tyr Leu Al - #a Val Trp Ile Glu Asp                            30 - #                 35 - #                 40              - - CAG AAC TGG CAG GAA GCT GCA CTT GGG AGT GA - #T GAT TCC AAG GCT ACC          195                                                                       Gln Asn Trp Gln Glu Ala Ala Leu Gly Ser As - #p Asp Ser Lys Ala Thr                        45     - #             50     - #             55                  - - ATG CTA TTC TTC CAC TTC TTG GAT CAG CTG AA - #C TAT GAG TGT GGC CGT          243                                                                       Met Leu Phe Phe His Phe Leu Asp Gln Leu As - #n Tyr Glu Cys Gly Arg                    60         - #         65         - #         70                      - - TGC AGC CAG GAC CCA GAG TCC TTG TTG CTG CA - #G CAC AAT TTG CGG AAA          291                                                                       Cys Ser Gln Asp Pro Glu Ser Leu Leu Leu Gl - #n His Asn Leu Arg Lys                75             - #     80             - #     85                          - - TTC TGC CGG GAC ATT CAG CCC TTT TCC CAG GA - #T CCT ACC CAG TTG GCT          339                                                                       Phe Cys Arg Asp Ile Gln Pro Phe Ser Gln As - #p Pro Thr Gln Leu Ala            90                 - # 95                 - #100                 - #105       - - GAG ATG ATC TTT AAC CTC CTT CTG GAA GAA AA - #A AGA ATT TTG ATC CAG          387                                                                       Glu Met Ile Phe Asn Leu Leu Leu Glu Glu Ly - #s Arg Ile Leu Ile Gln                           110  - #               115  - #               120              - - GCT CAG AGG GCC CAA TTG GAA CAA GGA GAG CC - #A GTT CTC GAA ACA CCT          435                                                                       Ala Gln Arg Ala Gln Leu Glu Gln Gly Glu Pr - #o Val Leu Glu Thr Pro                       125      - #           130      - #           135                  - - GTG GAG AGC CAG CAA CAT GAG ATT GAA TCC CG - #G ATC CTG GAT TTA AGG          483                                                                       Val Glu Ser Gln Gln His Glu Ile Glu Ser Ar - #g Ile Leu Asp Leu Arg                   140          - #       145          - #       150                      - - GCT ATG ATG GAG AAG CTG GTA AAA TCC ATC AG - #C CAA CTG AAA GAC CAG          531                                                                       Ala Met Met Glu Lys Leu Val Lys Ser Ile Se - #r Gln Leu Lys Asp Gln               155              - #   160              - #   165                          - - CAG GAT GTC TTC TGC TTC CGA TAT AAG ATC CA - #G GCC AAA GGG AAG ACA          579                                                                       Gln Asp Val Phe Cys Phe Arg Tyr Lys Ile Gl - #n Ala Lys Gly Lys Thr           170                 1 - #75                 1 - #80                 1 -      #85                                                                              - -  CCC TCT CTG GAC CCC CAT CAG ACC AAA GAG - #CAG AAG ATT CTG CAG        GAA     627                                                                     Pro Ser Leu Asp Pro His Gln Thr Lys Glu Gl - #n Lys Ile Leu Gln Glu                          190  - #               195  - #               200              - - ACT CTC AAT GAA CTG GAC AAA AGG AGA AAG GA - #G GTG CTG GAT GCC TCC          675                                                                       Thr Leu Asn Glu Leu Asp Lys Arg Arg Lys Gl - #u Val Leu Asp Ala Ser                       205      - #           210      - #           215                  - - AAA GCA CTG CTA GGC CGA TTA ACT ACC CTA AT - #C GAG CTA CTG CTG CCA          723                                                                       Lys Ala Leu Leu Gly Arg Leu Thr Thr Leu Il - #e Glu Leu Leu Leu Pro                   220          - #       225          - #       230                      - - AAG TTG GAG GAG TGG AAG GCC CAG CAG CAA AA - #A GCC TGC ATC AGA GCT          771                                                                       Lys Leu Glu Glu Trp Lys Ala Gln Gln Gln Ly - #s Ala Cys Ile Arg Ala               235              - #   240              - #   245                          - - CCC ATT GAC CAC GGG TTG GAA CAG CTG GAG AC - #A TGG TTC ACA GCT GGA          819                                                                       Pro Ile Asp His Gly Leu Glu Gln Leu Glu Th - #r Trp Phe Thr Ala Gly           250                 2 - #55                 2 - #60                 2 -      #65                                                                              - - GCA AAG CTG TTG TTT CAC CTG AGG CAG CTG CT - #G AAG GAG CTG AAG        GGA      867                                                                    Ala Lys Leu Leu Phe His Leu Arg Gln Leu Le - #u Lys Glu Leu Lys Gly                          270  - #               275  - #               280              - - CTG AGT TGC CTG GTT AGC TAT CAG GAT GAC CC - #T CTG ACC AAA GGG GTG          915                                                                       Leu Ser Cys Leu Val Ser Tyr Gln Asp Asp Pr - #o Leu Thr Lys Gly Val                       285      - #           290      - #           295                  - - GAC CTA CGC AAC GCC CAG GTC ACA GAG TTG CT - #A CAG CGT CTG CTC CAC          963                                                                       Asp Leu Arg Asn Ala Gln Val Thr Glu Leu Le - #u Gln Arg Leu Leu His                   300          - #       305          - #       310                      - - AGA GCC TTT GTG GTA GAA ACC CAG CCC TGC AT - #G CCC CAA ACT CCC CAT         1011                                                                       Arg Ala Phe Val Val Glu Thr Gln Pro Cys Me - #t Pro Gln Thr Pro His               315              - #   320              - #   325                          - - CGA CCC CTC ATC CTC AAG ACT GGC AGC AAG TT - #C ACC GTC CGA ACA AGG         1059                                                                       Arg Pro Leu Ile Leu Lys Thr Gly Ser Lys Ph - #e Thr Val Arg Thr Arg           330                 3 - #35                 3 - #40                 3 -      #45                                                                              - - CTG CTG GTG AGA CTC CAG GAA GGC AAT GAG TC - #A CTG ACT GTG GAA        GTC     1107                                                                    Leu Leu Val Arg Leu Gln Glu Gly Asn Glu Se - #r Leu Thr Val Glu Val                          350  - #               355  - #               360              - - TCC ATT GAC AGG AAT CCT CCT CAA TTA CAA GG - #C TTC CGG AAG TTC AAC         1155                                                                       Ser Ile Asp Arg Asn Pro Pro Gln Leu Gln Gl - #y Phe Arg Lys Phe Asn                       365      - #           370      - #           375                  - - ATT CTG ACT TCA AAC CAG AAA ACT TTG ACC CC - #C GAG AAG GGG CAG AGT         1203                                                                       Ile Leu Thr Ser Asn Gln Lys Thr Leu Thr Pr - #o Glu Lys Gly Gln Ser                   380          - #       385          - #       390                      - - CAG GGT TTG ATT TGG GAC TTT GGT TAC CTG AC - #T CTG GTG GAG CAA CGT         1251                                                                       Gln Gly Leu Ile Trp Asp Phe Gly Tyr Leu Th - #r Leu Val Glu Gln Arg               395              - #   400              - #   405                          - - TCA GGT GGT TCA GGA AAG GGC AGC AAT AAG GG - #G CCA CTA GGT GTG ACA         1299                                                                       Ser Gly Gly Ser Gly Lys Gly Ser Asn Lys Gl - #y Pro Leu Gly Val Thr           410                 4 - #15                 4 - #20                 4 -      #25                                                                              - - GAG GAA CTG CAC ATC ATC AGC TTC ACG GTC AA - #A TAT ACC TAC CAG        GGT     1347                                                                    Glu Glu Leu His Ile Ile Ser Phe Thr Val Ly - #s Tyr Thr Tyr Gln Gly                          430  - #               435  - #               440              - - CTG AAG CAG GAG CTG AAA ACG GAC ACC CTC CC - #T GTG GTG ATT ATT TCC         1395                                                                       Leu Lys Gln Glu Leu Lys Thr Asp Thr Leu Pr - #o Val Val Ile Ile Ser                       445      - #           450      - #           455                  - -  AAC ATG AAC CAG CTC TCA ATT GCC TGG GCT - #TCA GTT CTC TGG TTC AAT        1443                                                                        Asn Met Asn Gln Leu Ser Ile Ala Trp Ala Se - #r Val Leu Trp Phe Asn                   460          - #       465          - #       470                      - - TTG CTC AGC CCA AAC CTT CAG AAC CAG CAG TT - #C TTC TCC AAC CCC CCC         1491                                                                       Leu Leu Ser Pro Asn Leu Gln Asn Gln Gln Ph - #e Phe Ser Asn Pro Pro               475              - #   480              - #   485                          - - AAG GCC CCC TGG AGC TTG CTG GGC CCT GCT CT - #C AGT TGG CAG TTC TCC         1539                                                                       Lys Ala Pro Trp Ser Leu Leu Gly Pro Ala Le - #u Ser Trp Gln Phe Ser           490                 4 - #95                 5 - #00                 5 -      #05                                                                              - - TCC TAT GTT GGC CGA GGC CTC AAC TCA GAC CA - #G CTG AGC ATG CTG        AGA     1587                                                                    Ser Tyr Val Gly Arg Gly Leu Asn Ser Asp Gl - #n Leu Ser Met Leu Arg                          510  - #               515  - #               520              - - AAC AAG CTG TTC GGG CAG AAC TGT AGG ACT GA - #G GAT CCA TTA TTG TCC         1635                                                                       Asn Lys Leu Phe Gly Gln Asn Cys Arg Thr Gl - #u Asp Pro Leu Leu Ser                       525      - #           530      - #           535                  - - TGG GCT GAC TTC ACT AAG CGA GAG AGC CCT CC - #T GGC AAG TTA CCA TTC         1683                                                                       Trp Ala Asp Phe Thr Lys Arg Glu Ser Pro Pr - #o Gly Lys Leu Pro Phe                   540          - #       545          - #       550                      - - TGG ACA TGG CTG GAC AAA ATT CTG GAG TTG GT - #A CAT GAC CAC CTG AAG         1731                                                                       Trp Thr Trp Leu Asp Lys Ile Leu Glu Leu Va - #l His Asp His Leu Lys               555              - #   560              - #   565                          - - GAT CTC TGG AAT GAT GGA CGC ATC ATG GGC TT - #T GTG AGT CGG AGC CAG         1779                                                                       Asp Leu Trp Asn Asp Gly Arg Ile Met Gly Ph - #e Val Ser Arg Ser Gln           570                 5 - #75                 5 - #80                 5 -      #85                                                                              - - GAG CGC CGG CTG CTG AAG AAG ACC ATG TCT GG - #C ACC TTT CTA CTG        CGC     1827                                                                    Glu Arg Arg Leu Leu Lys Lys Thr Met Ser Gl - #y Thr Phe Leu Leu Arg                          590  - #               595  - #               600              - - TTC AGT GAA TCG TCA GAA GGG GGC ATT ACC TG - #C TCC TGG GTG GAG CAC         1875                                                                       Phe Ser Glu Ser Ser Glu Gly Gly Ile Thr Cy - #s Ser Trp Val Glu His                       605      - #           610      - #           615                  - - CAG GAT GAT GAC AAG GTG CTC ATC TAC TCT GT - #G CAA CCG TAC ACG AAG         1923                                                                       Gln Asp Asp Asp Lys Val Leu Ile Tyr Ser Va - #l Gln Pro Tyr Thr Lys                   620          - #       625          - #       630                      - - GAG GTG CTG CAG TCA CTC CCG CTG ACT GAA AT - #C ATC CGC CAT TAC CAG         1971                                                                       Glu Val Leu Gln Ser Leu Pro Leu Thr Glu Il - #e Ile Arg His Tyr Gln               635              - #   640              - #   645                          - - TTG CTC ACT GAG GAG AAT ATA CCT GAA AAC CC - #A CTG CGC TTC CTC TAT         2019                                                                       Leu Leu Thr Glu Glu Asn Ile Pro Glu Asn Pr - #o Leu Arg Phe Leu Tyr           650                 6 - #55                 6 - #60                 6 -      #65                                                                              - - CCC CGA ATC CCC CGG GAT GAA GCT TTT GGG TG - #C TAC TAC CAG GAG        AAA     2067                                                                    Pro Arg Ile Pro Arg Asp Glu Ala Phe Gly Cy - #s Tyr Tyr Gln Glu Lys                          670  - #               675  - #               680              - - GTT AAT CTC CAG GAA CGG AGG AAA TAC CTG AA - #A CAC AGG CTC ATT GTG         2115                                                                       Val Asn Leu Gln Glu Arg Arg Lys Tyr Leu Ly - #s His Arg Leu Ile Val                       685      - #           690      - #           695                  - - GTC TCT AAT AGA CAG GTG GAT GAA CTG CAA CA - #A CCG CTG GAG CTT AAG         2163                                                                       Val Ser Asn Arg Gln Val Asp Glu Leu Gln Gl - #n Pro Leu Glu Leu Lys                   700          - #       705          - #       710                      - - CCA GAG CCA GAG CTG GAG TCA TTA GAG CTG GA - #A CTA GGG CTG GTG CCA         2211                                                                       Pro Glu Pro Glu Leu Glu Ser Leu Glu Leu Gl - #u Leu Gly Leu Val Pro               715              - #   720              - #   725                          - -  GAG CCA GAG CTC AGC CTG GAC TTA GAG CCA - #CTG CTG AAG GCA GGG CTG        2259                                                                        Glu Pro Glu Leu Ser Leu Asp Leu Glu Pro Le - #u Leu Lys Ala Gly Leu           730                 7 - #35                 7 - #40                 7 -      #45                                                                              - - GAT CTG GGG CCA GAG CTA GAG TCT GTG CTG GA - #G TCC ACT CTG GAG        CCT     2307                                                                    Asp Leu Gly Pro Glu Leu Glu Ser Val Leu Gl - #u Ser Thr Leu Glu Pro                          750  - #               755  - #               760              - - GTG ATA GAG CCC ACA CTA TGC ATG GTA TCA CA - #A ACA GTG CCA GAG CCA         2355                                                                       Val Ile Glu Pro Thr Leu Cys Met Val Ser Gl - #n Thr Val Pro Glu Pro                       765      - #           770      - #           775                  - - GAC CAA GGA CCT GTA TCA CAG CCA GTG CCA GA - #G CCA GAT TTG CCC TGT         2403                                                                       Asp Gln Gly Pro Val Ser Gln Pro Val Pro Gl - #u Pro Asp Leu Pro Cys                   780          - #       785          - #       790                      - - GAT CTG AGA CAT TTG AAC ACT GAG CCA ATG GA - #A ATC TTC AGA AAC TGT         2451                                                                       Asp Leu Arg His Leu Asn Thr Glu Pro Met Gl - #u Ile Phe Arg Asn Cys               795              - #   800              - #   805                          - - GTA AAG ATT GAA GAA ATC ATG CCG AAT GGT GA - #C CCA CTG TTG GCT GGC         2499                                                                       Val Lys Ile Glu Glu Ile Met Pro Asn Gly As - #p Pro Leu Leu Ala Gly           810                 8 - #15                 8 - #20                 8 -      #25                                                                              - - CAG AAC ACC GTG GAT GAG GTT TAC GTC TCC CG - #C CCC AGC CAC TTC        TAC     2547                                                                    Gln Asn Thr Val Asp Glu Val Tyr Val Ser Ar - #g Pro Ser His Phe Tyr                          830  - #               835  - #               840              - - ACT GAT GGA CCC TTG ATG CCT TCT GAC TTC TA - #GGAACCAC ATTTCCTCTG           2597                                                                       Thr Asp Gly Pro Leu Met Pro Ser Asp Phe                                                   845      - #           850                                         - - TTCTTTTCAT ATCTCTTTGC CCTTCCTACT CCTCATAGCA TGATATTGTT CT -             #CCAAGGAT   2657                                                                 - - GGGAATCAGG CATGTGTCCC TTCCAAGCTG TGTTAACTGT TCAAACTCAG GC -            #CTGTGTGA   2717                                                                 - - CTCCATTGGG GTGAGAGGTG AAAGCATAAC ATGGGTACAG AGGGGACAAC AA -            #TGAATCAG   2777                                                                 - - AACAGATGCT GAGCCATAGG TCTAAATAGG ATCCTGGAGG CTGCCTGCTG TG -            #CTGGGAGG   2837                                                                 - - TATAGGGGTC CTGGGGGCAG GCCAGGGCAG TTGACAGGTA CTTGGAGGGC TC -            #AGGGCAGT   2897                                                                 - - GGCTTCTTTC CAGTATGGAA GGATTTCAAC ATTTTAATAG TTGGTTAGGC TA -            #AACTGGTG   2957                                                                 - - CATACTGGCA TTGGCCTTGG TGGGGAGCAC AGACACAGGA TAGGACTCCA TT -            #TCTTTCTT   3017                                                                 - - CCATTCCTTC ATGTCTAGGA TAACTTGCTT TCTTCTTTCC TTTACTCCTG GC -            #TCAAGCCC   3077                                                                 - - TGAATTTCTT CTTTTCCTGC AGGGGTTGAG AGCTTTCTGC CTTAGCCTAC CA -            #TGTGAAAC   3137                                                                 - - TCTACCCTGA AGAAAGGGAT GGATAGGAAG TAGACCTCTT TTTCTTACCA GT -            #CTCCTCCC   3197                                                                 - - CTACTCTGCC CCCTAAGCTG GCTGTACCTG TTCCTCCCCC ATAAAATGAT CC -            #TGCCAATC   3257                                                                 - - TAAAAAAAAA A               - #                  - #                      - #     3268                                                                  - -  - - (2) INFORMATION FOR SEQ ID NO:2:                                     - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 851 amino - #acids                                                (B) TYPE: amino acid                                                          (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: protein                                           - -           (xi) SEQUENCE DESCRIPTION: - # SEQ ID NO:2:                     - -  Met Ala Gln Trp Glu Met Leu Gln Asn Leu - #Asp Ser Pro Phe Gln Asp        1               5 - #                 10 - #                 15              - - Gln Leu His Gln Leu Tyr Ser His Ser Leu Le - #u Pro Val Asp Ile Arg                   20     - #             25     - #             30                  - - Gln Tyr Leu Ala Val Trp Ile Glu Asp Gln As - #n Trp Gln Glu Ala Ala               35         - #         40         - #         45                      - - Leu Gly Ser Asp Asp Ser Lys Ala Thr Met Le - #u Phe Phe His Phe Leu           50             - #     55             - #     60                          - - Asp Gln Leu Asn Tyr Glu Cys Gly Arg Cys Se - #r Gln Asp Pro Glu Ser       65                 - # 70                 - # 75                 - # 80       - - Leu Leu Leu Gln His Asn Leu Arg Lys Phe Cy - #s Arg Asp Ile Gln Pro                       85 - #                 90 - #                 95              - - Phe Ser Gln Asp Pro Thr Gln Leu Ala Glu Me - #t Ile Phe Asn Leu Leu                  100      - #           105      - #           110                  - - Leu Glu Glu Lys Arg Ile Leu Ile Gln Ala Gl - #n Arg Ala Gln Leu Glu              115          - #       120          - #       125                      - - Gln Gly Glu Pro Val Leu Glu Thr Pro Val Gl - #u Ser Gln Gln His Glu          130              - #   135              - #   140                          - - Ile Glu Ser Arg Ile Leu Asp Leu Arg Ala Me - #t Met Glu Lys Leu Val      145                 1 - #50                 1 - #55                 1 -      #60                                                                              - - Lys Ser Ile Ser Gln Leu Lys Asp Gln Gln As - #p Val Phe Cys Phe        Arg                                                                                             165  - #               170  - #               175             - - Tyr Lys Ile Gln Ala Lys Gly Lys Thr Pro Se - #r Leu Asp Pro His Gln                  180      - #           185      - #           190                  - - Thr Lys Glu Gln Lys Ile Leu Gln Glu Thr Le - #u Asn Glu Leu Asp Lys              195          - #       200          - #       205                      - - Arg Arg Lys Glu Val Leu Asp Ala Ser Lys Al - #a Leu Leu Gly Arg Leu          210              - #   215              - #   220                          - - Thr Thr Leu Ile Glu Leu Leu Leu Pro Lys Le - #u Glu Glu Trp Lys Ala      225                 2 - #30                 2 - #35                 2 -      #40                                                                              - - Gln Gln Gln Lys Ala Cys Ile Arg Ala Pro Il - #e Asp His Gly Leu        Glu                                                                                             245  - #               250  - #               255             - - Gln Leu Glu Thr Trp Phe Thr Ala Gly Ala Ly - #s Leu Leu Phe His Leu                  260      - #           265      - #           270                  - - Arg Gln Leu Leu Lys Glu Leu Lys Gly Leu Se - #r Cys Leu Val Ser Tyr              275          - #       280          - #       285                      - - Gln Asp Asp Pro Leu Thr Lys Gly Val Asp Le - #u Arg Asn Ala Gln Val          290              - #   295              - #   300                          - - Thr Glu Leu Leu Gln Arg Leu Leu His Arg Al - #a Phe Val Val Glu Thr      305                 3 - #10                 3 - #15                 3 -      #20                                                                              - - Gln Pro Cys Met Pro Gln Thr Pro His Arg Pr - #o Leu Ile Leu Lys        Thr                                                                                             325  - #               330  - #               335             - - Gly Ser Lys Phe Thr Val Arg Thr Arg Leu Le - #u Val Arg Leu Gln Glu                  340      - #           345      - #           350                  - - Gly Asn Glu Ser Leu Thr Val Glu Val Ser Il - #e Asp Arg Asn Pro Pro              355          - #       360          - #       365                      - - Gln Leu Gln Gly Phe Arg Lys Phe Asn Ile Le - #u Thr Ser Asn Gln Lys          370              - #   375              - #   380                          - - Thr Leu Thr Pro Glu Lys Gly Gln Ser Gln Gl - #y Leu Ile Trp Asp Phe      385                 3 - #90                 3 - #95                 4 -      #00                                                                              - - Gly Tyr Leu Thr Leu Val Glu Gln Arg Ser Gl - #y Gly Ser Gly Lys        Gly                                                                                             405  - #               410  - #               415             - - Ser Asn Lys Gly Pro Leu Gly Val Thr Glu Gl - #u Leu His Ile Ile Ser                  420      - #           425      - #           430                  - - Phe Thr Val Lys Tyr Thr Tyr Gln Gly Leu Ly - #s Gln Glu Leu Lys Thr              435          - #       440          - #       445                      - - Asp Thr Leu Pro Val Val Ile Ile Ser Asn Me - #t Asn Gln Leu Ser Ile          450              - #   455              - #   460                          - - Ala Trp Ala Ser Val Leu Trp Phe Asn Leu Le - #u Ser Pro Asn Leu Gln      465                 4 - #70                 4 - #75                 4 -      #80                                                                              - - Asn Gln Gln Phe Phe Ser Asn Pro Pro Lys Al - #a Pro Trp Ser Leu        Leu                                                                                             485  - #               490  - #               495             - - Gly Pro Ala Leu Ser Trp Gln Phe Ser Ser Ty - #r Val Gly Arg Gly Leu                  500      - #           505      - #           510                  - - Asn Ser Asp Gln Leu Ser Met Leu Arg Asn Ly - #s Leu Phe Gly Gln Asn              515          - #       520          - #       525                      - - Cys Arg Thr Glu Asp Pro Leu Leu Ser Trp Al - #a Asp Phe Thr Lys Arg          530              - #   535              - #   540                          - - Glu Ser Pro Pro Gly Lys Leu Pro Phe Trp Th - #r Trp Leu Asp Lys Ile      545                 5 - #50                 5 - #55                 5 -      #60                                                                              - - Leu Glu Leu Val His Asp His Leu Lys Asp Le - #u Trp Asn Asp Gly        Arg                                                                                             565  - #               570  - #               575             - - Ile Met Gly Phe Val Ser Arg Ser Gln Glu Ar - #g Arg Leu Leu Lys Lys                  580      - #           585      - #           590                  - - Thr Met Ser Gly Thr Phe Leu Leu Arg Phe Se - #r Glu Ser Ser Glu Gly              595          - #       600          - #       605                      - - Gly Ile Thr Cys Ser Trp Val Glu His Gln As - #p Asp Asp Lys Val Leu          610              - #   615              - #   620                          - - Ile Tyr Ser Val Gln Pro Tyr Thr Lys Glu Va - #l Leu Gln Ser Leu Pro      625                 6 - #30                 6 - #35                 6 -      #40                                                                              - - Leu Thr Glu Ile Ile Arg His Tyr Gln Leu Le - #u Thr Glu Glu Asn        Ile                                                                                             645  - #               650  - #               655             - - Pro Glu Asn Pro Leu Arg Phe Leu Tyr Pro Ar - #g Ile Pro Arg Asp Glu                  660      - #           665      - #           670                  - - Ala Phe Gly Cys Tyr Tyr Gln Glu Lys Val As - #n Leu Gln Glu Arg Arg              675          - #       680          - #       685                      - - Lys Tyr Leu Lys His Arg Leu Ile Val Val Se - #r Asn Arg Gln Val Asp          690              - #   695              - #   700                          - - Glu Leu Gln Gln Pro Leu Glu Leu Lys Pro Gl - #u Pro Glu Leu Glu Ser      705                 7 - #10                 7 - #15                 7 -      #20                                                                              - - Leu Glu Leu Glu Leu Gly Leu Val Pro Glu Pr - #o Glu Leu Ser Leu        Asp                                                                                             725  - #               730  - #               735             - - Leu Glu Pro Leu Leu Lys Ala Gly Leu Asp Le - #u Gly Pro Glu Leu Glu                  740      - #           745      - #           750                  - - Ser Val Leu Glu Ser Thr Leu Glu Pro Val Il - #e Glu Pro Thr Leu Cys              755          - #       760          - #       765                      - - Met Val Ser Gln Thr Val Pro Glu Pro Asp Gl - #n Gly Pro Val Ser Gln          770              - #   775              - #   780                          - - Pro Val Pro Glu Pro Asp Leu Pro Cys Asp Le - #u Arg His Leu Asn Thr      785                 7 - #90                 7 - #95                 8 -      #00                                                                              - - Glu Pro Met Glu Ile Phe Arg Asn Cys Val Ly - #s Ile Glu Glu Ile        Met                                                                                             805  - #               810  - #               815             - - Pro Asn Gly Asp Pro Leu Leu Ala Gly Gln As - #n Thr Val Asp Glu Val                  820      - #           825      - #           830                  - - Tyr Val Ser Arg Pro Ser His Phe Tyr Thr As - #p Gly Pro Leu Met Pro              835          - #       840          - #       845                      - - Ser Asp Phe                                                                  850                                                                        - -  - - (2) INFORMATION FOR SEQ ID NO:3:                                     - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 3943 base - #pairs                                                (B) TYPE: nucleic acid                                                        (C) STRANDEDNESS: both                                                        (D) TOPOLOGY: unknown                                                - -     (ii) MOLECULE TYPE: cDNA                                              - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -     (vi) ORIGINAL SOURCE:                                                          (A) ORGANISM: Homo sapi - #ens                                       - -    (vii) IMMEDIATE SOURCE:                                                         (B) CLONE: Human Stat91                                              - -     (ix) FEATURE:                                                                  (A) NAME/KEY: CDS                                                             (B) LOCATION: 197..2449                                              - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:3:                        - - ATTAAACCTC TCGCCGAGCC CCTCCGCAGA CTCTGCGCCG GAAAGTTTCA TT -             #TGCTGTAT     60                                                                 - - GCCATCCTCG AGAGCTGTCT AGGTTAACGT TCGCACTCTG TGTATATAAC CT -            #CGACAGTC    120                                                                 - - TTGGCACCTA ACGTGCTGTG CGTAGCTGCT CCTTTGGTTG AATCCCCAGG CC -            #CTTGTTGG    180                                                                 - - GGCACAAGGT GGCAGG ATG TCT CAG TGG TAC GAA CTT - #CAG CAG CTT GAC            229                                                                                         - #Met Ser Gln Trp Tyr Glu Leu Gln Gln Leu A - #sp                            - #  1               5 - #                 10                - - TCA AAA TTC CTG GAG CAG GTT CAC CAG CTT TA - #T GAT GAC AGT TTT CCC          277                                                                       Ser Lys Phe Leu Glu Gln Val His Gln Leu Ty - #r Asp Asp Ser Phe Pro                        15     - #             20     - #             25                  - - ATG GAA ATC AGA CAG TAC CTG GCA CAG TGG TT - #A GAA AAG CAA GAC TGG          325                                                                       Met Glu Ile Arg Gln Tyr Leu Ala Gln Trp Le - #u Glu Lys Gln Asp Trp                    30         - #         35         - #         40                      - - GAG CAC GCT GCC AAT GAT GTT TCA TTT GCC AC - #C ATC CGT TTT CAT GAC          373                                                                       Glu His Ala Ala Asn Asp Val Ser Phe Ala Th - #r Ile Arg Phe His Asp                45             - #     50             - #     55                          - - CTC CTG TCA CAG CTG GAT GAT CAA TAT AGT CG - #C TTT TCT TTG GAG AAT          421                                                                       Leu Leu Ser Gln Leu Asp Asp Gln Tyr Ser Ar - #g Phe Ser Leu Glu Asn            60                 - # 65                 - # 70                 - # 75       - - AAC TTC TTG CTA CAG CAT AAC ATA AGG AAA AG - #C AAG CGT AAT CTT CAG          469                                                                       Asn Phe Leu Leu Gln His Asn Ile Arg Lys Se - #r Lys Arg Asn Leu Gln                            80 - #                 85 - #                 90              - - GAT AAT TTT CAG GAA GAC CCA ATC CAG ATG TC - #T ATG ATC ATT TAC AGC          517                                                                       Asp Asn Phe Gln Glu Asp Pro Ile Gln Met Se - #r Met Ile Ile Tyr Ser                        95     - #            100     - #            105                  - - TGT CTG AAG GAA GAA AGG AAA ATT CTG GAA AA - #C GCC CAG AGA TTT AAT          565                                                                       Cys Leu Lys Glu Glu Arg Lys Ile Leu Glu As - #n Ala Gln Arg Phe Asn                   110          - #       115          - #       120                      - - CAG GCT CAG TCG GGG AAT ATT CAG AGC ACA GT - #G ATG TTA GAC AAA CAG          613                                                                       Gln Ala Gln Ser Gly Asn Ile Gln Ser Thr Va - #l Met Leu Asp Lys Gln               125              - #   130              - #   135                          - - AAA GAG CTT GAC AGT AAA GTC AGA AAT GTG AA - #G GAC AAG GTT ATG TGT          661                                                                       Lys Glu Leu Asp Ser Lys Val Arg Asn Val Ly - #s Asp Lys Val Met Cys           140                 1 - #45                 1 - #50                 1 -      #55                                                                              - - ATA GAG CAT GAA ATC AAG AGC CTG GAA GAT TT - #A CAA GAT GAA TAT        GAC      709                                                                    Ile Glu His Glu Ile Lys Ser Leu Glu Asp Le - #u Gln Asp Glu Tyr Asp                          160  - #               165  - #               170              - - TTC AAA TGC AAA ACC TTG CAG AAC AGA GAA CA - #C GAG ACC AAT GGT GTG          757                                                                       Phe Lys Cys Lys Thr Leu Gln Asn Arg Glu Hi - #s Glu Thr Asn Gly Val                       175      - #           180      - #           185                  - - GCA AAG AGT GAT CAG AAA CAA GAA CAG CTG TT - #A CTC AAG AAG ATG TAT          805                                                                       Ala Lys Ser Asp Gln Lys Gln Glu Gln Leu Le - #u Leu Lys Lys Met Tyr                   190          - #       195          - #       200                      - - TTA ATG CTT GAC AAT AAG AGA AAG GAA GTA GT - #T CAC AAA ATA ATA GAG          853                                                                       Leu Met Leu Asp Asn Lys Arg Lys Glu Val Va - #l His Lys Ile Ile Glu               205              - #   210              - #   215                          - - TTG CTG AAT GTC ACT GAA CTT ACC CAG AAT GC - #C CTG ATT AAT GAT GAA          901                                                                       Leu Leu Asn Val Thr Glu Leu Thr Gln Asn Al - #a Leu Ile Asn Asp Glu           220                 2 - #25                 2 - #30                 2 -      #35                                                                              - - CTA GTG GAG TGG AAG CGG AGA CAG CAG AGC GC - #C TGT ATT GGG GGG        CCG      949                                                                    Leu Val Glu Trp Lys Arg Arg Gln Gln Ser Al - #a Cys Ile Gly Gly Pro                          240  - #               245  - #               250              - - CCC AAT GCT TGC TTG GAT CAG CTG CAG AAC TG - #G TTC ACT ATA GTT GCG          997                                                                       Pro Asn Ala Cys Leu Asp Gln Leu Gln Asn Tr - #p Phe Thr Ile Val Ala                       255      - #           260      - #           265                  - - GAG AGT CTG CAG CAA GTT CGG CAG CAG CTT AA - #A AAG TTG GAG GAA TTG         1045                                                                       Glu Ser Leu Gln Gln Val Arg Gln Gln Leu Ly - #s Lys Leu Glu Glu Leu                   270          - #       275          - #       280                      - - GAA CAG AAA TAC ACC TAC GAA CAT GAC CCT AT - #C ACA AAA AAC AAA CAA         1093                                                                       Glu Gln Lys Tyr Thr Tyr Glu His Asp Pro Il - #e Thr Lys Asn Lys Gln               285              - #   290              - #   295                          - - GTG TTA TGG GAC CGC ACC TTC AGT CTT TTC CA - #G CAG CTC ATT CAG AGC         1141                                                                       Val Leu Trp Asp Arg Thr Phe Ser Leu Phe Gl - #n Gln Leu Ile Gln Ser           300                 3 - #05                 3 - #10                 3 -      #15                                                                              - -  TCG TTT GTG GTG GAA AGA CAG CCC TGC ATG - #CCA ACG CAC CCT CAG        AGG    1189                                                                     Ser Phe Val Val Glu Arg Gln Pro Cys Met Pr - #o Thr His Pro Gln Arg                          320  - #               325  - #               330              - - CCG CTG GTC TTG AAG ACA GGG GTC CAG TTC AC - #T GTG AAG TTG AGA CTG         1237                                                                       Pro Leu Val Leu Lys Thr Gly Val Gln Phe Th - #r Val Lys Leu Arg Leu                       335      - #           340      - #           345                  - - TTG GTG AAA TTG CAA GAG CTG AAT TAT AAT TT - #G AAA GTC AAA GTC TTA         1285                                                                       Leu Val Lys Leu Gln Glu Leu Asn Tyr Asn Le - #u Lys Val Lys Val Leu                   350          - #       355          - #       360                      - - TTT GAT AAA GAT GTG AAT GAG AGA AAT ACA GT - #A AAA GGA TTT AGG AAG         1333                                                                       Phe Asp Lys Asp Val Asn Glu Arg Asn Thr Va - #l Lys Gly Phe Arg Lys               365              - #   370              - #   375                          - - TTC AAC ATT TTG GGC ACG CAC ACA AAA GTG AT - #G AAC ATG GAG GAG TCC         1381                                                                       Phe Asn Ile Leu Gly Thr His Thr Lys Val Me - #t Asn Met Glu Glu Ser           380                 3 - #85                 3 - #90                 3 -      #95                                                                              - - ACC AAT GGC AGT CTG GCG GCT GAA TTT CGG CA - #C CTG CAA TTG AAA        GAA     1429                                                                    Thr Asn Gly Ser Leu Ala Ala Glu Phe Arg Hi - #s Leu Gln Leu Lys Glu                          400  - #               405  - #               410              - - CAG AAA AAT GCT GGC ACC AGA ACG AAT GAG GG - #T CCT CTC ATC GTT ACT         1477                                                                       Gln Lys Asn Ala Gly Thr Arg Thr Asn Glu Gl - #y Pro Leu Ile Val Thr                       415      - #           420      - #           425                  - - GAA GAG CTT CAC TCC CTT AGT TTT GAA ACC CA - #A TTG TGC CAG CCT GGT         1525                                                                       Glu Glu Leu His Ser Leu Ser Phe Glu Thr Gl - #n Leu Cys Gln Pro Gly                   430          - #       435          - #       440                      - - TTG GTA ATT GAC CTC GAG ACG ACC TCT CTG CC - #C GTT GTG GTG ATC TCC         1573                                                                       Leu Val Ile Asp Leu Glu Thr Thr Ser Leu Pr - #o Val Val Val Ile Ser               445              - #   450              - #   455                          - - AAC GTC AGC CAG CTC CCG AGC GGT TGG GCC TC - #C ATC CTT TGG TAC AAC         1621                                                                       Asn Val Ser Gln Leu Pro Ser Gly Trp Ala Se - #r Ile Leu Trp Tyr Asn           460                 4 - #65                 4 - #70                 4 -      #75                                                                              - - ATG CTG GTG GCG GAA CCC AGG AAT CTG TCC TT - #C TTC CTG ACT CCA        CCA     1669                                                                    Met Leu Val Ala Glu Pro Arg Asn Leu Ser Ph - #e Phe Leu Thr Pro Pro                          480  - #               485  - #               490              - - TGT GCA CGA TGG GCT CAG CTT TCA GAA GTG CT - #G AGT TGG CAG TTT TCT         1717                                                                       Cys Ala Arg Trp Ala Gln Leu Ser Glu Val Le - #u Ser Trp Gln Phe Ser                       495      - #           500      - #           505                  - - TCT GTC ACC AAA AGA GGT CTC AAT GTG GAC CA - #G CTG AAC ATG TTG GGA         1765                                                                       Ser Val Thr Lys Arg Gly Leu Asn Val Asp Gl - #n Leu Asn Met Leu Gly                   510          - #       515          - #       520                      - - GAG AAG CTT CTT GGT CCT AAC GCC AGC CCC GA - #T GGT CTC ATT CCG TGG         1813                                                                       Glu Lys Leu Leu Gly Pro Asn Ala Ser Pro As - #p Gly Leu Ile Pro Trp               525              - #   530              - #   535                          - - ACG AGG TTT TGT AAG GAA AAT ATA AAT GAT AA - #A AAT TTT CCC TTC TGG         1861                                                                       Thr Arg Phe Cys Lys Glu Asn Ile Asn Asp Ly - #s Asn Phe Pro Phe Trp           540                 5 - #45                 5 - #50                 5 -      #55                                                                              - - CTT TGG ATT GAA AGC ATC CTA GAA CTC ATT AA - #A AAA CAC CTG CTC        CCT     1909                                                                    Leu Trp Ile Glu Ser Ile Leu Glu Leu Ile Ly - #s Lys His Leu Leu Pro                          560  - #               565  - #               570              - - CTC TGG AAT GAT GGG TGC ATC ATG GGC TTC AT - #C AGC AAG GAG CGA GAG         1957                                                                       Leu Trp Asn Asp Gly Cys Ile Met Gly Phe Il - #e Ser Lys Glu Arg Glu                       575      - #           580      - #           585                  - -  CGT GCC CTG TTG AAG GAC CAG CAG CCG GGG - #ACC TTC CTG CTG CGG TTC        2005                                                                        Arg Ala Leu Leu Lys Asp Gln Gln Pro Gly Th - #r Phe Leu Leu Arg Phe                   590          - #       595          - #       600                      - - AGT GAG AGC TCC CGG GAA GGG GCC ATC ACA TT - #C ACA TGG GTG GAG CGG         2053                                                                       Ser Glu Ser Ser Arg Glu Gly Ala Ile Thr Ph - #e Thr Trp Val Glu Arg               605              - #   610              - #   615                          - - TCC CAG AAC GGA GGC GAA CCT GAC TTC CAT GC - #G GTT GAA CCC TAC ACG         2101                                                                       Ser Gln Asn Gly Gly Glu Pro Asp Phe His Al - #a Val Glu Pro Tyr Thr           620                 6 - #25                 6 - #30                 6 -      #35                                                                              - - AAG AAA GAA CTT TCT GCT GTT ACT TTC CCT GA - #C ATC ATT CGC AAT        TAC     2149                                                                    Lys Lys Glu Leu Ser Ala Val Thr Phe Pro As - #p Ile Ile Arg Asn Tyr                          640  - #               645  - #               650              - - AAA GTC ATG GCT GCT GAG AAT ATT CCT GAG AA - #T CCC CTG AAG TAT CTG         2197                                                                       Lys Val Met Ala Ala Glu Asn Ile Pro Glu As - #n Pro Leu Lys Tyr Leu                       655      - #           660      - #           665                  - - TAT CCA AAT ATT GAC AAA GAC CAT GCC TTT GG - #A AAG TAT TAC TCC AGG         2245                                                                       Tyr Pro Asn Ile Asp Lys Asp His Ala Phe Gl - #y Lys Tyr Tyr Ser Arg                   670          - #       675          - #       680                      - - CCA AAG GAA GCA CCA GAG CCA ATG GAA CTT GA - #T GGC CCT AAA GGA ACT         2293                                                                       Pro Lys Glu Ala Pro Glu Pro Met Glu Leu As - #p Gly Pro Lys Gly Thr               685              - #   690              - #   695                          - - GGA TAT ATC AAG ACT GAG TTG ATT TCT GTG TC - #T GAA GTT CAC CCT TCT         2341                                                                       Gly Tyr Ile Lys Thr Glu Leu Ile Ser Val Se - #r Glu Val His Pro Ser           700                 7 - #05                 7 - #10                 7 -      #15                                                                              - - AGA CTT CAG ACC ACA GAC AAC CTG CTC CCC AT - #G TCT CCT GAG GAG        TTT     2389                                                                    Arg Leu Gln Thr Thr Asp Asn Leu Leu Pro Me - #t Ser Pro Glu Glu Phe                          720  - #               725  - #               730              - - GAC GAG GTG TCT CGG ATA GTG GGC TCT GTA GA - #A TTC GAC AGT ATG ATG         2437                                                                       Asp Glu Val Ser Arg Ile Val Gly Ser Val Gl - #u Phe Asp Ser Met Met                       735      - #           740      - #           745                  - - AAC ACA GTA TAGAGCATGA ATTTTTTTCA TCTTCTCTGG CGACAGTTT - #T                 2486                                                                       Asn Thr Val                                                                           750                                                                    - - CCTTCTCATC TGTGATTCCC TCCTGCTACT CTGTTCCTTC ACATCCTGTG TT -             #TCTAGGGA   2546                                                                 - - AATGAAAGAA AGGCCAGCAA ATTCGCTGCA ACCTGTTGAT AGCAAGTGAA TT -            #TTTCTCTA   2606                                                                 - - ACTCAGAAAC ATCAGTTACT CTGAAGGGCA TCATGCATCT TACTGAAGGT AA -            #AATTGAAA   2666                                                                 - - GGCATTCTCT GAAGAGTGGG TTTCACAAGT GAAAAACATC CAGATACACC CA -            #AAGTATCA   2726                                                                 - - GGACGAGAAT GAGGGTCCTT TGGGAAAGGA GAAGTTAAGC AACATCTAGC AA -            #ATGTTATG   2786                                                                 - - CATAAAGTCA GTGCCCAACT GTTATAGGTT GTTGGATAAA TCAGTGGTTA TT -            #TAGGGAAC   2846                                                                 - - TGCTTGACGT AGGAACGGTA AATTTCTGTG GGAGAATTCT TACATGTTTT CT -            #TTGCTTTA   2906                                                                 - - AGTGTAACTG GCAGTTTTCC ATTGGTTTAC CTGTGAAATA GTTCAAAGCC AA -            #GTTTATAT   2966                                                                 - - ACAATTATAT CAGTCCTCTT TCAAAGGTAG CCATCATGGA TCTGGTAGGG GG -            #AAAATGTG   3026                                                                 - - TATTTTATTA CATCTTTCAC ATTGGCTATT TAAAGACAAA GACAAATTCT GT -            #TTCTTGAG   3086                                                                 - - AAGAGAACAT TTCCAAATTC ACAAGTTGTG TTTGATATCC AAAGCTGAAT AC -            #ATTCTGCT   3146                                                                 - - TTCATCTTGG TCACATACAA TTATTTTTAC AGTTCTCCCA AGGGAGTTAG GC -            #TATTCACA   3206                                                                 - - ACCACTCATT CAAAAGTTGA AATTAACCAT AGATGTAGAT AAACTCAGAA AT -            #TTAATTCA   3266                                                                 - - TGTTTCTTAA ATGGGCTACT TTGTCCTTTT TGTTATTAGG GTGGTATTTA GT -            #CTATTAGC   3326                                                                 - - CACAAAATTG GGAAAGGAGT AGAAAAAGCA GTAACTGACA ACTTGAATAA TA -            #CACCAGAG   3386                                                                 - - ATAATATGAG AATCAGATCA TTTCAAAACT CATTTCCTAT GTAACTGCAT TG -            #AGAACTGC   3446                                                                 - - ATATGTTTCG CTGATATATG TGTTTTTCAC ATTTGCGAAT GGTTCCATTC TC -            #TCTCCTGT   3506                                                                 - - ACTTTTTCCA GACACTTTTT TGAGTGGATG ATGTTTCGTG AAGTATACTG TA -            #TTTTTACC   3566                                                                 - - TTTTTCCTTC CTTATCACTG ACACAAAAAG TAGATTAAGA GATGGGTTTG AC -            #AAGGTTCT   3626                                                                 - - TCCCTTTTAC ATACTGCTGT CTATGTGGCT GTATCTTGTT TTTCCACTAC TG -            #CTACCACA   3686                                                                 - - ACTATATTAT CATGCAAATG CTGTATTCTT CTTTGGTGGA GATAAAGATT TC -            #TTGAGTTT   3746                                                                 - - TGTTTTAAAA TTAAAGCTAA AGTATCTGTA TTGCATTAAA TATAATATCG AC -            #ACAGTGCT   3806                                                                 - - TTCCGTGGCA CTGCATACAA TCTGAGGCCT CCTCTCTCAG TTTTTATATA GA -            #TGGCGAGA   3866                                                                 - - ACCTAAGTTT CAGTTGATTT TACAATTGAA ATGACTAAAA AACAAAGAAG AC -            #AACATTAA   3926                                                                 - - AAACAATATT GTTTCTA             - #                  - #                      - # 3943                                                                  - -  - - (2) INFORMATION FOR SEQ ID NO:4:                                     - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 750 amino - #acids                                                (B) TYPE: amino acid                                                          (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: protein                                           - -           (xi) SEQUENCE DESCRIPTION: - # SEQ ID NO:4:                     - - Met Ser Gln Trp Tyr Glu Leu Gln Gln Leu As - #p Ser Lys Phe Leu Glu        1               5 - #                 10 - #                 15              - - Gln Val His Gln Leu Tyr Asp Asp Ser Phe Pr - #o Met Glu Ile Arg Gln                   20     - #             25     - #             30                  - - Tyr Leu Ala Gln Trp Leu Glu Lys Gln Asp Tr - #p Glu His Ala Ala Asn               35         - #         40         - #         45                      - - Asp Val Ser Phe Ala Thr Ile Arg Phe His As - #p Leu Leu Ser Gln Leu           50             - #     55             - #     60                          - - Asp Asp Gln Tyr Ser Arg Phe Ser Leu Glu As - #n Asn Phe Leu Leu Gln       65                 - # 70                 - # 75                 - # 80       - - His Asn Ile Arg Lys Ser Lys Arg Asn Leu Gl - #n Asp Asn Phe Gln Glu                       85 - #                 90 - #                 95              - - Asp Pro Ile Gln Met Ser Met Ile Ile Tyr Se - #r Cys Leu Lys Glu Glu                  100      - #           105      - #           110                  - - Arg Lys Ile Leu Glu Asn Ala Gln Arg Phe As - #n Gln Ala Gln Ser Gly              115          - #       120          - #       125                      - - Asn Ile Gln Ser Thr Val Met Leu Asp Lys Gl - #n Lys Glu Leu Asp Ser          130              - #   135              - #   140                          - - Lys Val Arg Asn Val Lys Asp Lys Val Met Cy - #s Ile Glu His Glu Ile      145                 1 - #50                 1 - #55                 1 -      #60                                                                              - - Lys Ser Leu Glu Asp Leu Gln Asp Glu Tyr As - #p Phe Lys Cys Lys        Thr                                                                                             165  - #               170  - #               175             - - Leu Gln Asn Arg Glu His Glu Thr Asn Gly Va - #l Ala Lys Ser Asp Gln                  180      - #           185      - #           190                  - - Lys Gln Glu Gln Leu Leu Leu Lys Lys Met Ty - #r Leu Met Leu Asp Asn              195          - #       200          - #       205                      - - Lys Arg Lys Glu Val Val His Lys Ile Ile Gl - #u Leu Leu Asn Val Thr          210              - #   215              - #   220                          - - Glu Leu Thr Gln Asn Ala Leu Ile Asn Asp Gl - #u Leu Val Glu Trp Lys      225                 2 - #30                 2 - #35                 2 -      #40                                                                              - - Arg Arg Gln Gln Ser Ala Cys Ile Gly Gly Pr - #o Pro Asn Ala Cys        Leu                                                                                             245  - #               250  - #               255             - - Asp Gln Leu Gln Asn Trp Phe Thr Ile Val Al - #a Glu Ser Leu Gln Gln                  260      - #           265      - #           270                  - - Val Arg Gln Gln Leu Lys Lys Leu Glu Glu Le - #u Glu Gln Lys Tyr Thr              275          - #       280          - #       285                      - - Tyr Glu His Asp Pro Ile Thr Lys Asn Lys Gl - #n Val Leu Trp Asp Arg          290              - #   295              - #   300                          - - Thr Phe Ser Leu Phe Gln Gln Leu Ile Gln Se - #r Ser Phe Val Val Glu      305                 3 - #10                 3 - #15                 3 -      #20                                                                              - - Arg Gln Pro Cys Met Pro Thr His Pro Gln Ar - #g Pro Leu Val Leu        Lys                                                                                             325  - #               330  - #               335             - - Thr Gly Val Gln Phe Thr Val Lys Leu Arg Le - #u Leu Val Lys Leu Gln                  340      - #           345      - #           350                  - - Glu Leu Asn Tyr Asn Leu Lys Val Lys Val Le - #u Phe Asp Lys Asp Val              355          - #       360          - #       365                      - - Asn Glu Arg Asn Thr Val Lys Gly Phe Arg Ly - #s Phe Asn Ile Leu Gly          370              - #   375              - #   380                          - - Thr His Thr Lys Val Met Asn Met Glu Glu Se - #r Thr Asn Gly Ser Leu      385                 3 - #90                 3 - #95                 4 -      #00                                                                              - - Ala Ala Glu Phe Arg His Leu Gln Leu Lys Gl - #u Gln Lys Asn Ala        Gly                                                                                             405  - #               410  - #               415             - - Thr Arg Thr Asn Glu Gly Pro Leu Ile Val Th - #r Glu Glu Leu His Ser                  420      - #           425      - #           430                  - - Leu Ser Phe Glu Thr Gln Leu Cys Gln Pro Gl - #y Leu Val Ile Asp Leu              435          - #       440          - #       445                      - - Glu Thr Thr Ser Leu Pro Val Val Val Ile Se - #r Asn Val Ser Gln Leu          450              - #   455              - #   460                          - - Pro Ser Gly Trp Ala Ser Ile Leu Trp Tyr As - #n Met Leu Val Ala Glu      465                 4 - #70                 4 - #75                 4 -      #80                                                                              - - Pro Arg Asn Leu Ser Phe Phe Leu Thr Pro Pr - #o Cys Ala Arg Trp        Ala                                                                                             485  - #               490  - #               495             - - Gln Leu Ser Glu Val Leu Ser Trp Gln Phe Se - #r Ser Val Thr Lys Arg                  500      - #           505      - #           510                  - - Gly Leu Asn Val Asp Gln Leu Asn Met Leu Gl - #y Glu Lys Leu Leu Gly              515          - #       520          - #       525                      - - Pro Asn Ala Ser Pro Asp Gly Leu Ile Pro Tr - #p Thr Arg Phe Cys Lys          530              - #   535              - #   540                          - - Glu Asn Ile Asn Asp Lys Asn Phe Pro Phe Tr - #p Leu Trp Ile Glu Ser      545                 5 - #50                 5 - #55                 5 -      #60                                                                              - - Ile Leu Glu Leu Ile Lys Lys His Leu Leu Pr - #o Leu Trp Asn Asp        Gly                                                                                             565  - #               570  - #               575             - - Cys Ile Met Gly Phe Ile Ser Lys Glu Arg Gl - #u Arg Ala Leu Leu Lys                  580      - #           585      - #           590                  - - Asp Gln Gln Pro Gly Thr Phe Leu Leu Arg Ph - #e Ser Glu Ser Ser Arg              595          - #       600          - #       605                      - - Glu Gly Ala Ile Thr Phe Thr Trp Val Glu Ar - #g Ser Gln Asn Gly Gly          610              - #   615              - #   620                          - - Glu Pro Asp Phe His Ala Val Glu Pro Tyr Th - #r Lys Lys Glu Leu Ser      625                 6 - #30                 6 - #35                 6 -      #40                                                                              - - Ala Val Thr Phe Pro Asp Ile Ile Arg Asn Ty - #r Lys Val Met Ala        Ala                                                                                             645  - #               650  - #               655             - - Glu Asn Ile Pro Glu Asn Pro Leu Lys Tyr Le - #u Tyr Pro Asn Ile Asp                  660      - #           665      - #           670                  - - Lys Asp His Ala Phe Gly Lys Tyr Tyr Ser Ar - #g Pro Lys Glu Ala Pro              675          - #       680          - #       685                      - - Glu Pro Met Glu Leu Asp Gly Pro Lys Gly Th - #r Gly Tyr Ile Lys Thr          690              - #   695              - #   700                          - - Glu Leu Ile Ser Val Ser Glu Val His Pro Se - #r Arg Leu Gln Thr Thr      705                 7 - #10                 7 - #15                 7 -      #20                                                                              - - Asp Asn Leu Leu Pro Met Ser Pro Glu Glu Ph - #e Asp Glu Val Ser        Arg                                                                                             725  - #               730  - #               735             - - Ile Val Gly Ser Val Glu Phe Asp Ser Met Me - #t Asn Thr Val                          740      - #           745      - #           750                  - -  - - (2) INFORMATION FOR SEQ ID NO:5:                                     - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 2607 base - #pairs                                                (B) TYPE: nucleic acid                                                        (C) STRANDEDNESS: both                                                        (D) TOPOLOGY: unknown                                                - -     (ii) MOLECULE TYPE: cDNA                                              - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -     (vi) ORIGINAL SOURCE:                                                          (A) ORGANISM: Homo sapi - #ens                                       - -     (ix) FEATURE:                                                                  (A) NAME/KEY: CDS                                                             (B) LOCATION: 197..2335                                              - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:5:                        - - ATTAAACCTC TCGCCGAGCC CCTCCGCAGA CTCTGCGCCG GAAAGTTTCA TT -             #TGCTGTAT     60                                                                 - - GCCATCCTCG AGAGCTGTCT AGGTTAACGT TCGCACTCTG TGTATATAAC CT -            #CGACAGTC    120                                                                 - - TTGGCACCTA ACGTGCTGTG CGTAGCTGCT CCTTTGGTTG AATCCCCAGG CC -            #CTTGTTGG    180                                                                 - - GGCACAAGGT GGCAGG ATG TCT CAG TGG TAC GAA CTT - #CAG CAG CTT GAC            229                                                                                         - #Met Ser Gln Trp Tyr Glu Leu Gln Gln Leu A - #sp                            - #  1               5 - #                 10                - - TCA AAA TTC CTG GAG CAG GTT CAC CAG CTT TA - #T GAT GAC AGT TTT CCC          277                                                                       Ser Lys Phe Leu Glu Gln Val His Gln Leu Ty - #r Asp Asp Ser Phe Pro                        15     - #             20     - #             25                  - - ATG GAA ATC AGA CAG TAC CTG GCA CAG TGG TT - #A GAA AAG CAA GAC TGG          325                                                                       Met Glu Ile Arg Gln Tyr Leu Ala Gln Trp Le - #u Glu Lys Gln Asp Trp                    30         - #         35         - #         40                      - - GAG CAC GCT GCC AAT GAT GTT TCA TTT GCC AC - #C ATC CGT TTT CAT GAC          373                                                                       Glu His Ala Ala Asn Asp Val Ser Phe Ala Th - #r Ile Arg Phe His Asp                45             - #     50             - #     55                          - - CTC CTG TCA CAG CTG GAT GAT CAA TAT AGT CG - #C TTT TCT TTG GAG AAT          421                                                                       Leu Leu Ser Gln Leu Asp Asp Gln Tyr Ser Ar - #g Phe Ser Leu Glu Asn            60                 - # 65                 - # 70                 - # 75       - - AAC TTC TTG CTA CAG CAT AAC ATA AGG AAA AG - #C AAG CGT AAT CTT CAG          469                                                                       Asn Phe Leu Leu Gln His Asn Ile Arg Lys Se - #r Lys Arg Asn Leu Gln                            80 - #                 85 - #                 90              - - GAT AAT TTT CAG GAA GAC CCA ATC CAG ATG TC - #T ATG ATC ATT TAC AGC          517                                                                       Asp Asn Phe Gln Glu Asp Pro Ile Gln Met Se - #r Met Ile Ile Tyr Ser                        95     - #            100     - #            105                  - - TGT CTG AAG GAA GAA AGG AAA ATT CTG GAA AA - #C GCC CAG AGA TTT AAT          565                                                                       Cys Leu Lys Glu Glu Arg Lys Ile Leu Glu As - #n Ala Gln Arg Phe Asn                   110          - #       115          - #       120                      - - CAG GCT CAG TCG GGG AAT ATT CAG AGC ACA GT - #G ATG TTA GAC AAA CAG          613                                                                       Gln Ala Gln Ser Gly Asn Ile Gln Ser Thr Va - #l Met Leu Asp Lys Gln               125              - #   130              - #   135                          - - AAA GAG CTT GAC AGT AAA GTC AGA AAT GTG AA - #G GAC AAG GTT ATG TGT          661                                                                       Lys Glu Leu Asp Ser Lys Val Arg Asn Val Ly - #s Asp Lys Val Met Cys           140                 1 - #45                 1 - #50                 1 -      #55                                                                              - - ATA GAG CAT GAA ATC AAG AGC CTG GAA GAT TT - #A CAA GAT GAA TAT        GAC      709                                                                    Ile Glu His Glu Ile Lys Ser Leu Glu Asp Le - #u Gln Asp Glu Tyr Asp                          160  - #               165  - #               170              - - TTC AAA TGC AAA ACC TTG CAG AAC AGA GAA CA - #C GAG ACC AAT GGT GTG          757                                                                       Phe Lys Cys Lys Thr Leu Gln Asn Arg Glu Hi - #s Glu Thr Asn Gly Val                       175      - #           180      - #           185                  - - GCA AAG AGT GAT CAG AAA CAA GAA CAG CTG TT - #A CTC AAG AAG ATG TAT          805                                                                       Ala Lys Ser Asp Gln Lys Gln Glu Gln Leu Le - #u Leu Lys Lys Met Tyr                   190          - #       195          - #       200                      - - TTA ATG CTT GAC AAT AAG AGA AAG GAA GTA GT - #T CAC AAA ATA ATA GAG          853                                                                       Leu Met Leu Asp Asn Lys Arg Lys Glu Val Va - #l His Lys Ile Ile Glu               205              - #   210              - #   215                          - - TTG CTG AAT GTC ACT GAA CTT ACC CAG AAT GC - #C CTG ATT AAT GAT GAA          901                                                                       Leu Leu Asn Val Thr Glu Leu Thr Gln Asn Al - #a Leu Ile Asn Asp Glu           220                 2 - #25                 2 - #30                 2 -      #35                                                                              - - CTA GTG GAG TGG AAG CGG AGA CAG CAG AGC GC - #C TGT ATT GGG GGG        CCG      949                                                                    Leu Val Glu Trp Lys Arg Arg Gln Gln Ser Al - #a Cys Ile Gly Gly Pro                          240  - #               245  - #               250              - - CCC AAT GCT TGC TTG GAT CAG CTG CAG AAC TG - #G TTC ACT ATA GTT GCG          997                                                                       Pro Asn Ala Cys Leu Asp Gln Leu Gln Asn Tr - #p Phe Thr Ile Val Ala                       255      - #           260      - #           265                  - - GAG AGT CTG CAG CAA GTT CGG CAG CAG CTT AA - #A AAG TTG GAG GAA TTG         1045                                                                       Glu Ser Leu Gln Gln Val Arg Gln Gln Leu Ly - #s Lys Leu Glu Glu Leu                   270          - #       275          - #       280                      - - GAA CAG AAA TAC ACC TAC GAA CAT GAC CCT AT - #C ACA AAA AAC AAA CAA         1093                                                                       Glu Gln Lys Tyr Thr Tyr Glu His Asp Pro Il - #e Thr Lys Asn Lys Gln               285              - #   290              - #   295                          - - GTG TTA TGG GAC CGC ACC TTC AGT CTT TTC CA - #G CAG CTC ATT CAG AGC         1141                                                                       Val Leu Trp Asp Arg Thr Phe Ser Leu Phe Gl - #n Gln Leu Ile Gln Ser           300                 3 - #05                 3 - #10                 3 -      #15                                                                              - - TCG TTT GTG GTG GAA AGA CAG CCC TGC ATG CC - #A ACG CAC CCT CAG        AGG     1189                                                                    Ser Phe Val Val Glu Arg Gln Pro Cys Met Pr - #o Thr His Pro Gln Arg                          320  - #               325  - #               330              - - CCG CTG GTC TTG AAG ACA GGG GTC CAG TTC AC - #T GTG AAG TTG AGA CTG         1237                                                                       Pro Leu Val Leu Lys Thr Gly Val Gln Phe Th - #r Val Lys Leu Arg Leu                       335      - #           340      - #           345                  - - TTG GTG AAA TTG CAA GAG CTG AAT TAT AAT TT - #G AAA GTC AAA GTC TTA         1285                                                                       Leu Val Lys Leu Gln Glu Leu Asn Tyr Asn Le - #u Lys Val Lys Val Leu                   350          - #       355          - #       360                      - - TTT GAT AAA GAT GTG AAT GAG AGA AAT ACA GT - #A AAA GGA TTT AGG AAG         1333                                                                       Phe Asp Lys Asp Val Asn Glu Arg Asn Thr Va - #l Lys Gly Phe Arg Lys               365              - #   370              - #   375                          - - TTC AAC ATT TTG GGC ACG CAC ACA AAA GTG AT - #G AAC ATG GAG GAG TCC         1381                                                                       Phe Asn Ile Leu Gly Thr His Thr Lys Val Me - #t Asn Met Glu Glu Ser           380                 3 - #85                 3 - #90                 3 -      #95                                                                              - - ACC AAT GGC AGT CTG GCG GCT GAA TTT CGG CA - #C CTG CAA TTG AAA        GAA     1429                                                                    Thr Asn Gly Ser Leu Ala Ala Glu Phe Arg Hi - #s Leu Gln Leu Lys Glu                          400  - #               405  - #               410              - - CAG AAA AAT GCT GGC ACC AGA ACG AAT GAG GG - #T CCT CTC ATC GTT ACT         1477                                                                       Gln Lys Asn Ala Gly Thr Arg Thr Asn Glu Gl - #y Pro Leu Ile Val Thr                       415      - #           420      - #           425                  - - GAA GAG CTT CAC TCC CTT AGT TTT GAA ACC CA - #A TTG TGC CAG CCT GGT         1525                                                                       Glu Glu Leu His Ser Leu Ser Phe Glu Thr Gl - #n Leu Cys Gln Pro Gly                   430          - #       435          - #       440                      - - TTG GTA ATT GAC CTC GAG ACG ACC TCT CTG CC - #C GTT GTG GTG ATC TCC         1573                                                                       Leu Val Ile Asp Leu Glu Thr Thr Ser Leu Pr - #o Val Val Val Ile Ser               445              - #   450              - #   455                          - - AAC GTC AGC CAG CTC CCG AGC GGT TGG GCC TC - #C ATC CTT TGG TAC AAC         1621                                                                       Asn Val Ser Gln Leu Pro Ser Gly Trp Ala Se - #r Ile Leu Trp Tyr Asn           460                 4 - #65                 4 - #70                 4 -      #75                                                                              - - ATG CTG GTG GCG GAA CCC AGG AAT CTG TCC TT - #C TTC CTG ACT CCA        CCA     1669                                                                    Met Leu Val Ala Glu Pro Arg Asn Leu Ser Ph - #e Phe Leu Thr Pro Pro                          480  - #               485  - #               490              - - TGT GCA CGA TGG GCT CAG CTT TCA GAA GTG CT - #G AGT TGG CAG TTT TCT         1717                                                                       Cys Ala Arg Trp Ala Gln Leu Ser Glu Val Le - #u Ser Trp Gln Phe Ser                       495      - #           500      - #           505                  - - TCT GTC ACC AAA AGA GGT CTC AAT GTG GAC CA - #G CTG AAC ATG TTG GGA         1765                                                                       Ser Val Thr Lys Arg Gly Leu Asn Val Asp Gl - #n Leu Asn Met Leu Gly                   510          - #       515          - #       520                      - - GAG AAG CTT CTT GGT CCT AAC GCC AGC CCC GA - #T GGT CTC ATT CCG TGG         1813                                                                       Glu Lys Leu Leu Gly Pro Asn Ala Ser Pro As - #p Gly Leu Ile Pro Trp               525              - #   530              - #   535                          - -  ACG AGG TTT TGT AAG GAA AAT ATA AAT GAT - #AAA AAT TTT CCC TTC TGG        1861                                                                        Thr Arg Phe Cys Lys Glu Asn Ile Asn Asp Ly - #s Asn Phe Pro Phe Trp           540                 5 - #45                 5 - #50                 5 -      #55                                                                              - - CTT TGG ATT GAA AGC ATC CTA GAA CTC ATT AA - #A AAA CAC CTG CTC        CCT     1909                                                                    Leu Trp Ile Glu Ser Ile Leu Glu Leu Ile Ly - #s Lys His Leu Leu Pro                          560  - #               565  - #               570              - - CTC TGG AAT GAT GGG TGC ATC ATG GGC TTC AT - #C AGC AAG GAG CGA GAG         1957                                                                       Leu Trp Asn Asp Gly Cys Ile Met Gly Phe Il - #e Ser Lys Glu Arg Glu                       575      - #           580      - #           585                  - - CGT GCC CTG TTG AAG GAC CAG CAG CCG GGG AC - #C TTC CTG CTG CGG TTC         2005                                                                       Arg Ala Leu Leu Lys Asp Gln Gln Pro Gly Th - #r Phe Leu Leu Arg Phe                   590          - #       595          - #       600                      - - AGT GAG AGC TCC CGG GAA GGG GCC ATC ACA TT - #C ACA TGG GTG GAG CGG         2053                                                                       Ser Glu Ser Ser Arg Glu Gly Ala Ile Thr Ph - #e Thr Trp Val Glu Arg               605              - #   610              - #   615                          - - TCC CAG AAC GGA GGC GAA CCT GAC TTC CAT GC - #G GTT GAA CCC TAC ACG         2101                                                                       Ser Gln Asn Gly Gly Glu Pro Asp Phe His Al - #a Val Glu Pro Tyr Thr           620                 6 - #25                 6 - #30                 6 -      #35                                                                              - - AAG AAA GAA CTT TCT GCT GTT ACT TTC CCT GA - #C ATC ATT CGC AAT        TAC     2149                                                                    Lys Lys Glu Leu Ser Ala Val Thr Phe Pro As - #p Ile Ile Arg Asn Tyr                          640  - #               645  - #               650              - - AAA GTC ATG GCT GCT GAG AAT ATT CCT GAG AA - #T CCC CTG AAG TAT CTG         2197                                                                       Lys Val Met Ala Ala Glu Asn Ile Pro Glu As - #n Pro Leu Lys Tyr Leu                       655      - #           660      - #           665                  - - TAT CCA AAT ATT GAC AAA GAC CAT GCC TTT GG - #A AAG TAT TAC TCC AGG         2245                                                                       Tyr Pro Asn Ile Asp Lys Asp His Ala Phe Gl - #y Lys Tyr Tyr Ser Arg                   670          - #       675          - #       680                      - - CCA AAG GAA GCA CCA GAG CCA ATG GAA CTT GA - #T GGC CCT AAA GGA ACT         2293                                                                       Pro Lys Glu Ala Pro Glu Pro Met Glu Leu As - #p Gly Pro Lys Gly Thr               685              - #   690              - #   695                          - - GGA TAT ATC AAG ACT GAG TTG ATT TCT GTG TC - #T GAA GTG TAAGTGAACA          2342                                                                       Gly Tyr Ile Lys Thr Glu Leu Ile Ser Val Se - #r Glu Val                       700                 7 - #05                 7 - #10                            - - CAGAAGAGTG ACATGTTTAC AAACCTCAAG CCAGCCTTGC TCCTGGCTGG GG -             #CCTGTTGA   2402                                                                 - - AGATGCTTGT ATTTTACTTT TCCATTGTAA TTGCTATCGC CATCACAGCT GA -            #ACTTGTTG   2462                                                                 - - AGATCCCCGT GTTACTGCCT ATCAGCATTT TACTACTTTA AAAAAAAAAA AA -            #AAAGCCAA   2522                                                                 - - AAACCAAATT TGTATTTAAG GTATATAAAT TTTCCCAAAA CTGATACCCT TT -            #GAAAAAGT   2582                                                                 - - ATAAATAAAA TGAGCAAAAG TTGAA          - #                  - #                 2607                                                                     - -  - - (2) INFORMATION FOR SEQ ID NO:6:                                     - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 712 amino - #acids                                                (B) TYPE: amino acid                                                          (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: protein                                           - -           (xi) SEQUENCE DESCRIPTION: - # SEQ ID NO:6:                     - - Met Ser Gln Trp Tyr Glu Leu Gln Gln Leu As - #p Ser Lys Phe Leu Glu        1               5 - #                 10 - #                 15              - - Gln Val His Gln Leu Tyr Asp Asp Ser Phe Pr - #o Met Glu Ile Arg Gln                   20     - #             25     - #             30                  - - Tyr Leu Ala Gln Trp Leu Glu Lys Gln Asp Tr - #p Glu His Ala Ala Asn               35         - #         40         - #         45                      - - Asp Val Ser Phe Ala Thr Ile Arg Phe His As - #p Leu Leu Ser Gln Leu           50             - #     55             - #     60                          - - Asp Asp Gln Tyr Ser Arg Phe Ser Leu Glu As - #n Asn Phe Leu Leu Gln       65                 - # 70                 - # 75                 - # 80       - - His Asn Ile Arg Lys Ser Lys Arg Asn Leu Gl - #n Asp Asn Phe Gln Glu                       85 - #                 90 - #                 95              - - Asp Pro Ile Gln Met Ser Met Ile Ile Tyr Se - #r Cys Leu Lys Glu Glu                  100      - #           105      - #           110                  - - Arg Lys Ile Leu Glu Asn Ala Gln Arg Phe As - #n Gln Ala Gln Ser Gly              115          - #       120          - #       125                      - - Asn Ile Gln Ser Thr Val Met Leu Asp Lys Gl - #n Lys Glu Leu Asp Ser          130              - #   135              - #   140                          - - Lys Val Arg Asn Val Lys Asp Lys Val Met Cy - #s Ile Glu His Glu Ile      145                 1 - #50                 1 - #55                 1 -      #60                                                                              - - Lys Ser Leu Glu Asp Leu Gln Asp Glu Tyr As - #p Phe Lys Cys Lys        Thr                                                                                             165  - #               170  - #               175             - - Leu Gln Asn Arg Glu His Glu Thr Asn Gly Va - #l Ala Lys Ser Asp Gln                  180      - #           185      - #           190                  - - Lys Gln Glu Gln Leu Leu Leu Lys Lys Met Ty - #r Leu Met Leu Asp Asn              195          - #       200          - #       205                      - - Lys Arg Lys Glu Val Val His Lys Ile Ile Gl - #u Leu Leu Asn Val Thr          210              - #   215              - #   220                          - - Glu Leu Thr Gln Asn Ala Leu Ile Asn Asp Gl - #u Leu Val Glu Trp Lys      225                 2 - #30                 2 - #35                 2 -      #40                                                                              - - Arg Arg Gln Gln Ser Ala Cys Ile Gly Gly Pr - #o Pro Asn Ala Cys        Leu                                                                                             245  - #               250  - #               255             - - Asp Gln Leu Gln Asn Trp Phe Thr Ile Val Al - #a Glu Ser Leu Gln Gln                  260      - #           265      - #           270                  - - Val Arg Gln Gln Leu Lys Lys Leu Glu Glu Le - #u Glu Gln Lys Tyr Thr              275          - #       280          - #       285                      - - Tyr Glu His Asp Pro Ile Thr Lys Asn Lys Gl - #n Val Leu Trp Asp Arg          290              - #   295              - #   300                          - - Thr Phe Ser Leu Phe Gln Gln Leu Ile Gln Se - #r Ser Phe Val Val Glu      305                 3 - #10                 3 - #15                 3 -      #20                                                                              - - Arg Gln Pro Cys Met Pro Thr His Pro Gln Ar - #g Pro Leu Val Leu        Lys                                                                                             325  - #               330  - #               335             - - Thr Gly Val Gln Phe Thr Val Lys Leu Arg Le - #u Leu Val Lys Leu Gln                  340      - #           345      - #           350                  - - Glu Leu Asn Tyr Asn Leu Lys Val Lys Val Le - #u Phe Asp Lys Asp Val              355          - #       360          - #       365                      - - Asn Glu Arg Asn Thr Val Lys Gly Phe Arg Ly - #s Phe Asn Ile Leu Gly          370              - #   375              - #   380                          - - Thr His Thr Lys Val Met Asn Met Glu Glu Se - #r Thr Asn Gly Ser Leu      385                 3 - #90                 3 - #95                 4 -      #00                                                                              - - Ala Ala Glu Phe Arg His Leu Gln Leu Lys Gl - #u Gln Lys Asn Ala        Gly                                                                                             405  - #               410  - #               415             - - Thr Arg Thr Asn Glu Gly Pro Leu Ile Val Th - #r Glu Glu Leu His Ser                  420      - #           425      - #           430                  - - Leu Ser Phe Glu Thr Gln Leu Cys Gln Pro Gl - #y Leu Val Ile Asp Leu              435          - #       440          - #       445                      - - Glu Thr Thr Ser Leu Pro Val Val Val Ile Se - #r Asn Val Ser Gln Leu          450              - #   455              - #   460                          - - Pro Ser Gly Trp Ala Ser Ile Leu Trp Tyr As - #n Met Leu Val Ala Glu      465                 4 - #70                 4 - #75                 4 -      #80                                                                              - - Pro Arg Asn Leu Ser Phe Phe Leu Thr Pro Pr - #o Cys Ala Arg Trp        Ala                                                                                             485  - #               490  - #               495             - - Gln Leu Ser Glu Val Leu Ser Trp Gln Phe Se - #r Ser Val Thr Lys Arg                  500      - #           505      - #           510                  - - Gly Leu Asn Val Asp Gln Leu Asn Met Leu Gl - #y Glu Lys Leu Leu Gly              515          - #       520          - #       525                      - - Pro Asn Ala Ser Pro Asp Gly Leu Ile Pro Tr - #p Thr Arg Phe Cys Lys          530              - #   535              - #   540                          - - Glu Asn Ile Asn Asp Lys Asn Phe Pro Phe Tr - #p Leu Trp Ile Glu Ser      545                 5 - #50                 5 - #55                 5 -      #60                                                                              - - Ile Leu Glu Leu Ile Lys Lys His Leu Leu Pr - #o Leu Trp Asn Asp        Gly                                                                                             565  - #               570  - #               575             - - Cys Ile Met Gly Phe Ile Ser Lys Glu Arg Gl - #u Arg Ala Leu Leu Lys                  580      - #           585      - #           590                  - - Asp Gln Gln Pro Gly Thr Phe Leu Leu Arg Ph - #e Ser Glu Ser Ser Arg              595          - #       600          - #       605                      - - Glu Gly Ala Ile Thr Phe Thr Trp Val Glu Ar - #g Ser Gln Asn Gly Gly          610              - #   615              - #   620                          - - Glu Pro Asp Phe His Ala Val Glu Pro Tyr Th - #r Lys Lys Glu Leu Ser      625                 6 - #30                 6 - #35                 6 -      #40                                                                              - - Ala Val Thr Phe Pro Asp Ile Ile Arg Asn Ty - #r Lys Val Met Ala        Ala                                                                                             645  - #               650  - #               655             - - Glu Asn Ile Pro Glu Asn Pro Leu Lys Tyr Le - #u Tyr Pro Asn Ile Asp                  660      - #           665      - #           670                  - - Lys Asp His Ala Phe Gly Lys Tyr Tyr Ser Ar - #g Pro Lys Glu Ala Pro              675          - #       680          - #       685                      - - Glu Pro Met Glu Leu Asp Gly Pro Lys Gly Th - #r Gly Tyr Ile Lys Thr          690              - #   695              - #   700                          - - Glu Leu Ile Ser Val Ser Glu Val                                          705                 7 - #10                                                    - -  - - (2) INFORMATION FOR SEQ ID NO:7:                                     - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 2277 base - #pairs                                                (B) TYPE: nucleic acid                                                        (C) STRANDEDNESS: both                                                        (D) TOPOLOGY: unknown                                                - -     (ii) MOLECULE TYPE: cDNA                                              - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -     (vi) ORIGINAL SOURCE:                                                          (A) ORGANISM: Mouse                                                  - -    (vii) IMMEDIATE SOURCE:                                                         (B) CLONE: Murine Stat9 - #1                                         - -     (ix) FEATURE:                                                                  (A) NAME/KEY: CDS                                                             (B) LOCATION: 5..2251                                                - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:7:                        - - CAGG ATG TCA CAG TGG TTC GAG CTT CAG CAG C - #TG GAC TCC AAG TTC        CTG      49                                                                          Met Ser Gln Trp Phe Glu Leu Gln - # Gln Leu Asp Ser Lys Phe Leu                1           - #    5              - #    10              - #          15                                                                               - - GAG CAG GTC CAC CAG CTG TAC GAT GAC AGT TT - #C CCC ATG GAA ATC        AGA       97                                                                    Glu Gln Val His Gln Leu Tyr Asp Asp Ser Ph - #e Pro Met Glu Ile Arg                           20 - #                 25 - #                 30              - - CAG TAC CTG GCC CAG TGG CTG GAA AAG CAA GA - #C TGG GAG CAC GCT GCC          145                                                                       Gln Tyr Leu Ala Gln Trp Leu Glu Lys Gln As - #p Trp Glu His Ala Ala                        35     - #             40     - #             45                  - - TAT GAT GTC TCG TTT GCG ACC ATC CGC TTC CA - #T GAC CTC CTC TCA CAG          193                                                                       Tyr Asp Val Ser Phe Ala Thr Ile Arg Phe Hi - #s Asp Leu Leu Ser Gln                    50         - #         55         - #         60                      - - CTG GAC GAC CAG TAC AGC CGC TTT TCT CTG GA - #G AAT AAT TTC TTG TTG          241                                                                       Leu Asp Asp Gln Tyr Ser Arg Phe Ser Leu Gl - #u Asn Asn Phe Leu Leu                65             - #     70             - #     75                          - - CAG CAC AAC ATA CGG AAA AGC AAG CGT AAT CT - #C CAG GAT AAC TTC CAA          289                                                                       Gln His Asn Ile Arg Lys Ser Lys Arg Asn Le - #u Gln Asp Asn Phe Gln            80                 - # 85                 - # 90                 - # 95       - - GAA GAT CCC GTA CAG ATG TCC ATG ATC ATC TA - #C AAC TGT CTG AAG GAA          337                                                                       Glu Asp Pro Val Gln Met Ser Met Ile Ile Ty - #r Asn Cys Leu Lys Glu                           100  - #               105  - #               110              - - GAA AGG AAG ATT TTG GAA AAT GCC CAA AGA TT - #T AAT CAG GCC CAG GAG          385                                                                       Glu Arg Lys Ile Leu Glu Asn Ala Gln Arg Ph - #e Asn Gln Ala Gln Glu                       115      - #           120      - #           125                  - - GGA AAT ATT CAG AAC ACT GTG ATG TTA GAT AA - #A CAG AAG GAG CTG GAC          433                                                                       Gly Asn Ile Gln Asn Thr Val Met Leu Asp Ly - #s Gln Lys Glu Leu Asp                   130          - #       135          - #       140                      - - AGT AAA GTC AGA AAT GTG AAG GAT CAA GTC AT - #G TGC ATA GAG CAG GAA          481                                                                       Ser Lys Val Arg Asn Val Lys Asp Gln Val Me - #t Cys Ile Glu Gln Glu               145              - #   150              - #   155                          - - ATC AAG ACC CTA GAA GAA TTA CAA GAT GAA TA - #T GAC TTT AAA TGC AAA          529                                                                       Ile Lys Thr Leu Glu Glu Leu Gln Asp Glu Ty - #r Asp Phe Lys Cys Lys           160                 1 - #65                 1 - #70                 1 -      #75                                                                              - - ACC TCT CAG AAC AGA GAA GGT GAA GCC AAT GG - #T GTG GCG AAG AGC        GAC      577                                                                    Thr Ser Gln Asn Arg Glu Gly Glu Ala Asn Gl - #y Val Ala Lys Ser Asp                          180  - #               185  - #               190              - - CAA AAA CAG GAA CAG CTG CTG CTC CAC AAG AT - #G TTT TTA ATG CTT GAC          625                                                                       Gln Lys Gln Glu Gln Leu Leu Leu His Lys Me - #t Phe Leu Met Leu Asp                       195      - #           200      - #           205                  - - AAT AAG AGA AAG GAG ATA ATT CAC AAA ATC AG - #A GAG TTG CTG AAT TCC          673                                                                       Asn Lys Arg Lys Glu Ile Ile His Lys Ile Ar - #g Glu Leu Leu Asn Ser                   210          - #       215          - #       220                      - - ATC GAG CTC ACT CAG AAC ACT CTG ATT AAT GA - #C GAG CTC GTG GAG TGG          721                                                                       Ile Glu Leu Thr Gln Asn Thr Leu Ile Asn As - #p Glu Leu Val Glu Trp               225              - #   230              - #   235                          - - AAG CGA AGG CAG CAG AGC GCC TGC ATC GGG GG - #A CCG CCC AAC GCC TGC          769                                                                       Lys Arg Arg Gln Gln Ser Ala Cys Ile Gly Gl - #y Pro Pro Asn Ala Cys           240                 2 - #45                 2 - #50                 2 -      #55                                                                              - - CTG GAT CAG CTG CAA ACG TGG TTC ACC ATT GT - #T GCA GAG ACC CTG        CAG      817                                                                    Leu Asp Gln Leu Gln Thr Trp Phe Thr Ile Va - #l Ala Glu Thr Leu Gln                          260  - #               265  - #               270              - - CAG ATC CGT CAG CAG CTT AAA AAG CTG GAG GA - #G TTG GAA CAG AAA TTC          865                                                                       Gln Ile Arg Gln Gln Leu Lys Lys Leu Glu Gl - #u Leu Glu Gln Lys Phe                       275      - #           280      - #           285                  - - ACC TAT GAG CCC GAC CCT ATT ACA AAA AAC AA - #G CAG GTG TTG TCA GAT          913                                                                       Thr Tyr Glu Pro Asp Pro Ile Thr Lys Asn Ly - #s Gln Val Leu Ser Asp                   290          - #       295          - #       300                      - - CGA ACC TTC CTC CTC TTC CAG CAG CTC ATT CA - #G AGC TCC TTC GTG GTA          961                                                                       Arg Thr Phe Leu Leu Phe Gln Gln Leu Ile Gl - #n Ser Ser Phe Val Val               305              - #   310              - #   315                          - - GAA CGA CAG CCG TGC ATG CCC ACT CAC CCG CA - #G AGG CCC CTG GTC TTG         1009                                                                       Glu Arg Gln Pro Cys Met Pro Thr His Pro Gl - #n Arg Pro Leu Val Leu           320                 3 - #25                 3 - #30                 3 -      #35                                                                              - - AAG ACT GGG GTA CAG TTC ACT GTC AAG TCG AG - #A CTG TTG GTG AAA        TTG     1057                                                                    Lys Thr Gly Val Gln Phe Thr Val Lys Ser Ar - #g Leu Leu Val Lys Leu                          340  - #               345  - #               350              - - CAA GAG TCG AAT CTA TTA ACG AAA GTG AAA TG - #T CAC TTT GAC AAA GAT         1105                                                                       Gln Glu Ser Asn Leu Leu Thr Lys Val Lys Cy - #s His Phe Asp Lys Asp                       355      - #           360      - #           365                  - - GTG AAC GAG AAA AAC ACA GTT AAA GGA TTT CG - #G AAG TTC AAC ATC TTG         1153                                                                       Val Asn Glu Lys Asn Thr Val Lys Gly Phe Ar - #g Lys Phe Asn Ile Leu                   370          - #       375          - #       380                      - - GGT ACG CAC ACA AAA GTG ATG AAC ATG GAA GA - #A TCC ACC AAC GGA AGT         1201                                                                       Gly Thr His Thr Lys Val Met Asn Met Glu Gl - #u Ser Thr Asn Gly Ser               385              - #   390              - #   395                          - - CTG GCA GCT GAG CTC CGA CAC CTG CAA CTG AA - #G GAA CAG AAA AAC GCT         1249                                                                       Leu Ala Ala Glu Leu Arg His Leu Gln Leu Ly - #s Glu Gln Lys Asn Ala           400                 4 - #05                 4 - #10                 4 -      #15                                                                              - - GGG AAC AGA ACT AAT GAG GGG CCT CTC ATT GT - #C ACC GAA GAA CTT        CAC     1297                                                                    Gly Asn Arg Thr Asn Glu Gly Pro Leu Ile Va - #l Thr Glu Glu Leu His                          420  - #               425  - #               430              - - TCT CTT AGC TTT GAA ACC CAG TTG TGC CAG CC - #A GGC TTG GTG ATT GAC         1345                                                                       Ser Leu Ser Phe Glu Thr Gln Leu Cys Gln Pr - #o Gly Leu Val Ile Asp                       435      - #           440      - #           445                  - - CTG GAG ACC ACC TCT CTT CCT GTC GTG GTG AT - #C TCC AAC GTC AGC CAG         1393                                                                       Leu Glu Thr Thr Ser Leu Pro Val Val Val Il - #e Ser Asn Val Ser Gln                   450          - #       455          - #       460                      - -  CTC CCC AGT GGC TGG GCG TCT ATC CTG TGG - #TAC AAC ATG CTG GTG ACA        1441                                                                        Leu Pro Ser Gly Trp Ala Ser Ile Leu Trp Ty - #r Asn Met Leu Val Thr               465              - #   470              - #   475                          - - GAG CCC AGG AAT CTC TCC TTC TTC CTG AAC CC - #C CCG TGC GCG TGG TGG         1489                                                                       Glu Pro Arg Asn Leu Ser Phe Phe Leu Asn Pr - #o Pro Cys Ala Trp Trp           480                 4 - #85                 4 - #90                 4 -      #95                                                                              - - TCC CAG CTC TCA GAG GTG TTG AGT TGG CAG TT - #T TCA TCA GTC ACC        AAG     1537                                                                    Ser Gln Leu Ser Glu Val Leu Ser Trp Gln Ph - #e Ser Ser Val Thr Lys                          500  - #               505  - #               510              - - AGA GGT CTG AAC GCA GAC CAG CTG AGC ATG CT - #G GGA GAG AAG CTG CTG         1585                                                                       Arg Gly Leu Asn Ala Asp Gln Leu Ser Met Le - #u Gly Glu Lys Leu Leu                       515      - #           520      - #           525                  - - GGC CCT AAT GCT GGC CCT GAT GGT CTT ATT CC - #A TGG ACA AGG TTT TGT         1633                                                                       Gly Pro Asn Ala Gly Pro Asp Gly Leu Ile Pr - #o Trp Thr Arg Phe Cys                   530          - #       535          - #       540                      - - AAG GAA AAT ATT AAT GAT AAA AAT TTC TCC TT - #C TGG CCT TGG ATT GAC         1681                                                                       Lys Glu Asn Ile Asn Asp Lys Asn Phe Ser Ph - #e Trp Pro Trp Ile Asp               545              - #   550              - #   555                          - - ACC ATC CTA GAG CTC ATT AAG AAC GAC CTG CT - #G TGC CTC TGG AAT GAT         1729                                                                       Thr Ile Leu Glu Leu Ile Lys Asn Asp Leu Le - #u Cys Leu Trp Asn Asp           560                 5 - #65                 5 - #70                 5 -      #75                                                                              - - GGG TGC ATT ATG GGC TTC ATC AGC AAG GAG CG - #A GAA CGC GCT CTG        CTC     1777                                                                    Gly Cys Ile Met Gly Phe Ile Ser Lys Glu Ar - #g Glu Arg Ala Leu Leu                          580  - #               585  - #               590              - - AAG GAC CAG CAG CCA GGG ACG TTC CTG CTT AG - #A TTC AGT GAG AGC TCC         1825                                                                       Lys Asp Gln Gln Pro Gly Thr Phe Leu Leu Ar - #g Phe Ser Glu Ser Ser                       595      - #           600      - #           605                  - - CGG GAA GGG GCC ATC ACA TTC ACA TGG GTG GA - #A CGG TCC CAG AAC GGA         1873                                                                       Arg Glu Gly Ala Ile Thr Phe Thr Trp Val Gl - #u Arg Ser Gln Asn Gly                   610          - #       615          - #       620                      - - GGT GAA CCT GAC TTC CAT GCC GTG GAG CCC TA - #C ACG AAA AAA GAA CTT         1921                                                                       Gly Glu Pro Asp Phe His Ala Val Glu Pro Ty - #r Thr Lys Lys Glu Leu               625              - #   630              - #   635                          - - TCA GCT GTT ACT TTC CCA GAT ATT ATT CGC AA - #C TAC AAA GTC ATG GCT         1969                                                                       Ser Ala Val Thr Phe Pro Asp Ile Ile Arg As - #n Tyr Lys Val Met Ala           640                 6 - #45                 6 - #50                 6 -      #55                                                                              - - GCC GAG AAC ATA CCA GAG AAT CCC CTG AAG TA - #T CTG TAC CCC AAT        ATT     2017                                                                    Ala Glu Asn Ile Pro Glu Asn Pro Leu Lys Ty - #r Leu Tyr Pro Asn Ile                          660  - #               665  - #               670              - - GAC AAA GAC CAC GCC TTT GGG AAG TAT TAT TC - #C AGA CCA AAG GAA GCA         2065                                                                       Asp Lys Asp His Ala Phe Gly Lys Tyr Tyr Se - #r Arg Pro Lys Glu Ala                       675      - #           680      - #           685                  - - CCA GAA CCG ATG GAG CTT GAC GAC CCT AAG CG - #A ACT GGA TAC ATC AAG         2113                                                                       Pro Glu Pro Met Glu Leu Asp Asp Pro Lys Ar - #g Thr Gly Tyr Ile Lys                   690          - #       695          - #       700                      - - ACT GAG TTG ATT TCT GTG TCT GAA GTC CAC CC - #T TCT AGA CTT CAG ACC         2161                                                                       Thr Glu Leu Ile Ser Val Ser Glu Val His Pr - #o Ser Arg Leu Gln Thr               705              - #   710              - #   715                          - - ACA GAC AAC CTG CTT CCC ATG TCT CCA GAG GA - #G TTT GAT GAG ATG TCC         2209                                                                       Thr Asp Asn Leu Leu Pro Met Ser Pro Glu Gl - #u Phe Asp Glu Met Ser           720                 7 - #25                 7 - #30                 7 -      #35                                                                              - -  CGG ATA GTG GGC CCC GAA TTT GAC AGT ATG - #ATG AGC ACA GTA                - #2251                                                                    Arg Ile Val Gly Pro Glu Phe Asp Ser Met Me - #t Ser Thr Val                                   740  - #               745                                     - - TAAACACGAA TTTCTCTCTG GCGACA          - #                  - #                2277                                                                      - -  - - (2) INFORMATION FOR SEQ ID NO:8:                                     - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 749 amino - #acids                                                (B) TYPE: amino acid                                                          (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: protein                                           - -           (xi) SEQUENCE DESCRIPTION: - # SEQ ID NO:8:                     - - Met Ser Gln Trp Phe Glu Leu Gln Gln Leu As - #p Ser Lys Phe Leu Glu        1               5 - #                 10 - #                 15              - - Gln Val His Gln Leu Tyr Asp Asp Ser Phe Pr - #o Met Glu Ile Arg Gln                   20     - #             25     - #             30                  - - Tyr Leu Ala Gln Trp Leu Glu Lys Gln Asp Tr - #p Glu His Ala Ala Tyr               35         - #         40         - #         45                      - - Asp Val Ser Phe Ala Thr Ile Arg Phe His As - #p Leu Leu Ser Gln Leu           50             - #     55             - #     60                          - - Asp Asp Gln Tyr Ser Arg Phe Ser Leu Glu As - #n Asn Phe Leu Leu Gln       65                 - # 70                 - # 75                 - # 80       - - His Asn Ile Arg Lys Ser Lys Arg Asn Leu Gl - #n Asp Asn Phe Gln Glu                       85 - #                 90 - #                 95              - - Asp Pro Val Gln Met Ser Met Ile Ile Tyr As - #n Cys Leu Lys Glu Glu                  100      - #           105      - #           110                  - - Arg Lys Ile Leu Glu Asn Ala Gln Arg Phe As - #n Gln Ala Gln Glu Gly              115          - #       120          - #       125                      - - Asn Ile Gln Asn Thr Val Met Leu Asp Lys Gl - #n Lys Glu Leu Asp Ser          130              - #   135              - #   140                          - - Lys Val Arg Asn Val Lys Asp Gln Val Met Cy - #s Ile Glu Gln Glu Ile      145                 1 - #50                 1 - #55                 1 -      #60                                                                              - - Lys Thr Leu Glu Glu Leu Gln Asp Glu Tyr As - #p Phe Lys Cys Lys        Thr                                                                                             165  - #               170  - #               175             - - Ser Gln Asn Arg Glu Gly Glu Ala Asn Gly Va - #l Ala Lys Ser Asp Gln                  180      - #           185      - #           190                  - - Lys Gln Glu Gln Leu Leu Leu His Lys Met Ph - #e Leu Met Leu Asp Asn              195          - #       200          - #       205                      - - Lys Arg Lys Glu Ile Ile His Lys Ile Arg Gl - #u Leu Leu Asn Ser Ile          210              - #   215              - #   220                          - - Glu Leu Thr Gln Asn Thr Leu Ile Asn Asp Gl - #u Leu Val Glu Trp Lys      225                 2 - #30                 2 - #35                 2 -      #40                                                                              - - Arg Arg Gln Gln Ser Ala Cys Ile Gly Gly Pr - #o Pro Asn Ala Cys        Leu                                                                                             245  - #               250  - #               255             - - Asp Gln Leu Gln Thr Trp Phe Thr Ile Val Al - #a Glu Thr Leu Gln Gln                  260      - #           265      - #           270                  - - Ile Arg Gln Gln Leu Lys Lys Leu Glu Glu Le - #u Glu Gln Lys Phe Thr              275          - #       280          - #       285                      - - Tyr Glu Pro Asp Pro Ile Thr Lys Asn Lys Gl - #n Val Leu Ser Asp Arg          290              - #   295              - #   300                          - - Thr Phe Leu Leu Phe Gln Gln Leu Ile Gln Se - #r Ser Phe Val Val Glu      305                 3 - #10                 3 - #15                 3 -      #20                                                                              - - Arg Gln Pro Cys Met Pro Thr His Pro Gln Ar - #g Pro Leu Val Leu        Lys                                                                                             325  - #               330  - #               335             - - Thr Gly Val Gln Phe Thr Val Lys Ser Arg Le - #u Leu Val Lys Leu Gln                  340      - #           345      - #           350                  - - Glu Ser Asn Leu Leu Thr Lys Val Lys Cys Hi - #s Phe Asp Lys Asp Val              355          - #       360          - #       365                      - - Asn Glu Lys Asn Thr Val Lys Gly Phe Arg Ly - #s Phe Asn Ile Leu Gly          370              - #   375              - #   380                          - - Thr His Thr Lys Val Met Asn Met Glu Glu Se - #r Thr Asn Gly Ser Leu      385                 3 - #90                 3 - #95                 4 -      #00                                                                              - - Ala Ala Glu Leu Arg His Leu Gln Leu Lys Gl - #u Gln Lys Asn Ala        Gly                                                                                             405  - #               410  - #               415             - - Asn Arg Thr Asn Glu Gly Pro Leu Ile Val Th - #r Glu Glu Leu His Ser                  420      - #           425      - #           430                  - - Leu Ser Phe Glu Thr Gln Leu Cys Gln Pro Gl - #y Leu Val Ile Asp Leu              435          - #       440          - #       445                      - - Glu Thr Thr Ser Leu Pro Val Val Val Ile Se - #r Asn Val Ser Gln Leu          450              - #   455              - #   460                          - - Pro Ser Gly Trp Ala Ser Ile Leu Trp Tyr As - #n Met Leu Val Thr Glu      465                 4 - #70                 4 - #75                 4 -      #80                                                                              - - Pro Arg Asn Leu Ser Phe Phe Leu Asn Pro Pr - #o Cys Ala Trp Trp        Ser                                                                                             485  - #               490  - #               495             - - Gln Leu Ser Glu Val Leu Ser Trp Gln Phe Se - #r Ser Val Thr Lys Arg                  500      - #           505      - #           510                  - - Gly Leu Asn Ala Asp Gln Leu Ser Met Leu Gl - #y Glu Lys Leu Leu Gly              515          - #       520          - #       525                      - - Pro Asn Ala Gly Pro Asp Gly Leu Ile Pro Tr - #p Thr Arg Phe Cys Lys          530              - #   535              - #   540                          - - Glu Asn Ile Asn Asp Lys Asn Phe Ser Phe Tr - #p Pro Trp Ile Asp Thr      545                 5 - #50                 5 - #55                 5 -      #60                                                                              - - Ile Leu Glu Leu Ile Lys Asn Asp Leu Leu Cy - #s Leu Trp Asn Asp        Gly                                                                                             565  - #               570  - #               575             - - Cys Ile Met Gly Phe Ile Ser Lys Glu Arg Gl - #u Arg Ala Leu Leu Lys                  580      - #           585      - #           590                  - - Asp Gln Gln Pro Gly Thr Phe Leu Leu Arg Ph - #e Ser Glu Ser Ser Arg              595          - #       600          - #       605                      - - Glu Gly Ala Ile Thr Phe Thr Trp Val Glu Ar - #g Ser Gln Asn Gly Gly          610              - #   615              - #   620                          - - Glu Pro Asp Phe His Ala Val Glu Pro Tyr Th - #r Lys Lys Glu Leu Ser      625                 6 - #30                 6 - #35                 6 -      #40                                                                              - - Ala Val Thr Phe Pro Asp Ile Ile Arg Asn Ty - #r Lys Val Met Ala        Ala                                                                                             645  - #               650  - #               655             - - Glu Asn Ile Pro Glu Asn Pro Leu Lys Tyr Le - #u Tyr Pro Asn Ile Asp                  660      - #           665      - #           670                  - - Lys Asp His Ala Phe Gly Lys Tyr Tyr Ser Ar - #g Pro Lys Glu Ala Pro              675          - #       680          - #       685                      - - Glu Pro Met Glu Leu Asp Asp Pro Lys Arg Th - #r Gly Tyr Ile Lys Thr          690              - #   695              - #   700                          - - Glu Leu Ile Ser Val Ser Glu Val His Pro Se - #r Arg Leu Gln Thr Thr      705                 7 - #10                 7 - #15                 7 -      #20                                                                              - - Asp Asn Leu Leu Pro Met Ser Pro Glu Glu Ph - #e Asp Glu Met Ser        Arg                                                                                             725  - #               730  - #               735             - - Ile Val Gly Pro Glu Phe Asp Ser Met Met Se - #r Thr Val                              740      - #           745                                         - -  - - (2) INFORMATION FOR SEQ ID NO:9:                                     - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 2375 base - #pairs                                                (B) TYPE: nucleic acid                                                        (C) STRANDEDNESS: both                                                        (D) TOPOLOGY: unknown                                                - -     (ii) MOLECULE TYPE: cDNA                                              - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -     (vi) ORIGINAL SOURCE:                                                          (A) ORGANISM: Mouse                                                  - -    (vii) IMMEDIATE SOURCE:                                                         (A) LIBRARY: splenic/thymi - #c                                               (B) CLONE: Murine 13sf1                                              - -     (ix) FEATURE:                                                                  (A) NAME/KEY: CDS                                                             (B) LOCATION: 34..2277                                               - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:9:                        - - TGCCACTACC TGGACGGAGA GAGAGAGAGC AGC ATG TCT CAG TG - #G AAT CAA        GTC      54                                                                                       - #                  - # Met Ser Gln Trp Asn Gln Val                         - #                  - #   1               - #5              - - CAA CAA TTA GAA ATC AAG TTT TTG GAG CAA GT - #A GAT CAG TTC TAT GAT          102                                                                       Gln Gln Leu Glu Ile Lys Phe Leu Glu Gln Va - #l Asp Gln Phe Tyr Asp                    10         - #         15         - #         20                      - - GAC AAC TTT CCT ATG GAA ATC CGG CAT CTG CT - #A GCT CAG TGG ATT GAG          150                                                                       Asp Asn Phe Pro Met Glu Ile Arg His Leu Le - #u Ala Gln Trp Ile Glu                25             - #     30             - #     35                          - - ACT CAA GAC TGG GAA GTA GCT TCT AAC AAT GA - #A ACT ATG GCA ACA ATT          198                                                                       Thr Gln Asp Trp Glu Val Ala Ser Asn Asn Gl - #u Thr Met Ala Thr Ile            40                 - # 45                 - # 50                 - # 55       - - CTG CTT CAA AAC TTA CTA ATA CAA TTG GAT GA - #A CAG TTG GGG CGG GTT          246                                                                       Leu Leu Gln Asn Leu Leu Ile Gln Leu Asp Gl - #u Gln Leu Gly Arg Val                            60 - #                 65 - #                 70              - - TCC AAA GAA AAA AAT CTG CTA TTG ATT CAC AA - #T CTA AAG AGA ATT AGA          294                                                                       Ser Lys Glu Lys Asn Leu Leu Leu Ile His As - #n Leu Lys Arg Ile Arg                        75     - #             80     - #             85                  - - AAA GTT CTT CAG GGC AAG TTT CAT GGA AAT CC - #A ATG CAT GTA GCT GTG          342                                                                       Lys Val Leu Gln Gly Lys Phe His Gly Asn Pr - #o Met His Val Ala Val                    90         - #         95         - #        100                      - - GTA ATT TCA AAT TGC TTA AGG GAA GAG AGG AG - #A ATA TTG GCT GCA GCC          390                                                                       Val Ile Ser Asn Cys Leu Arg Glu Glu Arg Ar - #g Ile Leu Ala Ala Ala               105              - #   110              - #   115                          - - AAC ATG CCT ATC CAG GGA CCT CTG GAG AAA TC - #C TTA CAG AGT TCT TCA          438                                                                       Asn Met Pro Ile Gln Gly Pro Leu Glu Lys Se - #r Leu Gln Ser Ser Ser           120                 1 - #25                 1 - #30                 1 -      #35                                                                              - - GTT TCT GAA AGA CAA AGG AAT GTG GAA CAC AA - #A GTG TCT GCC ATT        AAA      486                                                                    Val Ser Glu Arg Gln Arg Asn Val Glu His Ly - #s Val Ser Ala Ile Lys                          140  - #               145  - #               150              - - AAC AGT GTG CAG ATG ACA GAA CAA GAT ACC AA - #A TAC TTA GAA GAC CTG          534                                                                       Asn Ser Val Gln Met Thr Glu Gln Asp Thr Ly - #s Tyr Leu Glu Asp Leu                       155      - #           160      - #           165                  - - CAA GAT GAG TTT GAC TAC AGG TAT AAA ACA AT - #T CAG ACA ATG GAT CAG          582                                                                       Gln Asp Glu Phe Asp Tyr Arg Tyr Lys Thr Il - #e Gln Thr Met Asp Gln                   170          - #       175          - #       180                      - - GGT GAC AAA AAC AGT ATC CTG GTG AAC CAG GA - #A GTT TTG ACA CTG CTG          630                                                                       Gly Asp Lys Asn Ser Ile Leu Val Asn Gln Gl - #u Val Leu Thr Leu Leu               185              - #   190              - #   195                          - - CAA GAA ATG CTT AAT AGT CTG GAC TTC AAG AG - #A AAG GAA GCA CTC AGT          678                                                                       Gln Glu Met Leu Asn Ser Leu Asp Phe Lys Ar - #g Lys Glu Ala Leu Ser           200                 2 - #05                 2 - #10                 2 -      #15                                                                              - - AAG ATG ACG CAG ATA GTG AAC GAG ACA GAC CT - #G CTC ATG AAC AGC        ATG      726                                                                    Lys Met Thr Gln Ile Val Asn Glu Thr Asp Le - #u Leu Met Asn Ser Met                          220  - #               225  - #               230              - - CTT CTA GAA GAG CTG CAG GAC TGG AAA AAG CG - #G CAC AGG ATT GCC TGC          774                                                                       Leu Leu Glu Glu Leu Gln Asp Trp Lys Lys Ar - #g His Arg Ile Ala Cys                       235      - #           240      - #           245                  - - ATT GGT GGC CCG CTC CAC AAT GGG CTG GAC CA - #G CTT CAG AAC TGC TTT          822                                                                       Ile Gly Gly Pro Leu His Asn Gly Leu Asp Gl - #n Leu Gln Asn Cys Phe                   250          - #       255          - #       260                      - - ACC CTA CTG GCA GAG AGT CTT TTC CAA CTC AG - #A CAG CAA CTG GAG AAA          870                                                                       Thr Leu Leu Ala Glu Ser Leu Phe Gln Leu Ar - #g Gln Gln Leu Glu Lys               265              - #   270              - #   275                          - - CTA CAG GAG CAA TCT ACT AAA ATG ACC TAT GA - #A GGG GAT CCC ATC CCT          918                                                                       Leu Gln Glu Gln Ser Thr Lys Met Thr Tyr Gl - #u Gly Asp Pro Ile Pro           280                 2 - #85                 2 - #90                 2 -      #95                                                                              - - GCT CAA AGA GCA CAC CTC CTG GAA AGA GCT AC - #C TTC CTG ATC TAC        AAC      966                                                                    Ala Gln Arg Ala His Leu Leu Glu Arg Ala Th - #r Phe Leu Ile Tyr Asn                          300  - #               305  - #               310              - - CTT TTC AAG AAC TCA TTT GTG GTC GAG CGA CA - #C GCA TGC ATG CCA ACG         1014                                                                       Leu Phe Lys Asn Ser Phe Val Val Glu Arg Hi - #s Ala Cys Met Pro Thr                       315      - #           320      - #           325                  - - CAC CCT CAG AGG CCG ATG GTA CTT AAA ACC CT - #C ATT CAG TTC ACT GTA         1062                                                                       His Pro Gln Arg Pro Met Val Leu Lys Thr Le - #u Ile Gln Phe Thr Val                   330          - #       335          - #       340                      - -  AAA CTG AGA TTA CTA ATA AAA TTG CCG GAA - #CTA AAC TAT CAG GTG AAA        1110                                                                        Lys Leu Arg Leu Leu Ile Lys Leu Pro Glu Le - #u Asn Tyr Gln Val Lys               345              - #   350              - #   355                          - - GTA AAG GCG TCC ATT GAC AAG AAT GTT TCA AC - #T CTA AGC AAT AGA AGA         1158                                                                       Val Lys Ala Ser Ile Asp Lys Asn Val Ser Th - #r Leu Ser Asn Arg Arg           360                 3 - #65                 3 - #70                 3 -      #75                                                                              - - TTT GTG CTT TGT GGA ACT CAC GTC AAA GCT AT - #G TCC AGT GAG GAA        TCT     1206                                                                    Phe Val Leu Cys Gly Thr His Val Lys Ala Me - #t Ser Ser Glu Glu Ser                          380  - #               385  - #               390              - - TCC AAT GGG AGC CTC TCA GTG GAG TTA GAC AT - #T GCA ACC CAA GGA GAT         1254                                                                       Ser Asn Gly Ser Leu Ser Val Glu Leu Asp Il - #e Ala Thr Gln Gly Asp                       395      - #           400      - #           405                  - - GAA GTG CAG TAC TGG AGT AAA GGA AAC GAG GG - #C TGC CAC ATG GTG ACA         1302                                                                       Glu Val Gln Tyr Trp Ser Lys Gly Asn Glu Gl - #y Cys His Met Val Thr                   410          - #       415          - #       420                      - - GAG GAG TTG CAT TCC ATA ACC TTT GAG ACC CA - #G ATC TGC CTC TAT GGC         1350                                                                       Glu Glu Leu His Ser Ile Thr Phe Glu Thr Gl - #n Ile Cys Leu Tyr Gly               425              - #   430              - #   435                          - - CTC ACC ATT AAC CTA GAG ACC AGC TCA TTA CC - #T GTC GTG ATG ATT TCT         1398                                                                       Leu Thr Ile Asn Leu Glu Thr Ser Ser Leu Pr - #o Val Val Met Ile Ser           440                 4 - #45                 4 - #50                 4 -      #55                                                                              - - AAT GTC AGC CAA CTA CCT AAT GCA TGG GCA TC - #C ATC ATT TGG TAC        AAT     1446                                                                    Asn Val Ser Gln Leu Pro Asn Ala Trp Ala Se - #r Ile Ile Trp Tyr Asn                          460  - #               465  - #               470              - - GTA TCA ACT AAC GAC TCC CAG AAC TTG GTT TT - #C TTT AAT AAC CCT CCA         1494                                                                       Val Ser Thr Asn Asp Ser Gln Asn Leu Val Ph - #e Phe Asn Asn Pro Pro                       475      - #           480      - #           485                  - - TCT GTC ACT TTG GGC CAA CTC CTG GAA GTG AT - #G AGC TGG CAA TTT TCA         1542                                                                       Ser Val Thr Leu Gly Gln Leu Leu Glu Val Me - #t Ser Trp Gln Phe Ser                   490          - #       495          - #       500                      - - TCC TAT GTC GGT CGT GGC CTT AAT TCA GAG CA - #G CTC AAC ATG CTG GCA         1590                                                                       Ser Tyr Val Gly Arg Gly Leu Asn Ser Glu Gl - #n Leu Asn Met Leu Ala               505              - #   510              - #   515                          - - GAG AAG CTC ACA GTT CAG TCT AAC TAC AAT GA - #T GGT CAC CTC ACC TGG         1638                                                                       Glu Lys Leu Thr Val Gln Ser Asn Tyr Asn As - #p Gly His Leu Thr Trp           520                 5 - #25                 5 - #30                 5 -      #35                                                                              - - GCC AAG TTC TGC AAG GAA CAT TTG CCT GGC AA - #A ACA TTT ACC TTC        TGG     1686                                                                    Ala Lys Phe Cys Lys Glu His Leu Pro Gly Ly - #s Thr Phe Thr Phe Trp                          540  - #               545  - #               550              - - ACT TGG CTT GAA GCA ATA TTG GAC CTA ATT AA - #A AAA CAT ATT CTT CCC         1734                                                                       Thr Trp Leu Glu Ala Ile Leu Asp Leu Ile Ly - #s Lys His Ile Leu Pro                       555      - #           560      - #           565                  - - CTC TGG ATT GAT GGG TAC ATC ATG GGA TTT GT - #T AGT AAA GAG AAG GAA         1782                                                                       Leu Trp Ile Asp Gly Tyr Ile Met Gly Phe Va - #l Ser Lys Glu Lys Glu                   570          - #       575          - #       580                      - - CGG CTT CTG CTC AAA GAT AAA ATG CCT GGG AC - #A TTT TTG TTA AGA TTC         1830                                                                       Arg Leu Leu Leu Lys Asp Lys Met Pro Gly Th - #r Phe Leu Leu Arg Phe               585              - #   590              - #   595                          - - AGT GAG AGC CAT CTT GGA GGG ATA ACC TTC AC - #C TGG GTG GAC CAA TCT         1878                                                                       Ser Glu Ser His Leu Gly Gly Ile Thr Phe Th - #r Trp Val Asp Gln Ser           600                 6 - #05                 6 - #10                 6 -      #15                                                                              - -  GAA AAT GGA GAA GTG AGA TTC CAC TCT GTA - #GAA CCC TAC AAC AAA        GGG    1926                                                                     Glu Asn Gly Glu Val Arg Phe His Ser Val Gl - #u Pro Tyr Asn Lys Gly                          620  - #               625  - #               630              - - AGA CTG TCG GCT CTG GCC TTC GCT GAC ATC CT - #G CGA GAC TAC AAG GTT         1974                                                                       Arg Leu Ser Ala Leu Ala Phe Ala Asp Ile Le - #u Arg Asp Tyr Lys Val                       635      - #           640      - #           645                  - - ATC ATG GCT GAA AAC ATC CCT GAA AAC CCT CT - #G AAG TAC CTC TAC CCT         2022                                                                       Ile Met Ala Glu Asn Ile Pro Glu Asn Pro Le - #u Lys Tyr Leu Tyr Pro                   650          - #       655          - #       660                      - - GAC ATT CCC AAA GAC AAA GCC TTT GGC AAA CA - #C TAC AGC TCC CAG CCG         2070                                                                       Asp Ile Pro Lys Asp Lys Ala Phe Gly Lys Hi - #s Tyr Ser Ser Gln Pro               665              - #   670              - #   675                          - - TGC GAA GTC TCA AGA CCA ACC GAA CGG GGA GA - #C AAG GGT TAC GTC CCC         2118                                                                       Cys Glu Val Ser Arg Pro Thr Glu Arg Gly As - #p Lys Gly Tyr Val Pro           680                 6 - #85                 6 - #90                 6 -      #95                                                                              - - TCT GTT TTT ATC CCC ATT TCA ACA ATC CGA AG - #C GAT TCC ACG GAG        CCA     2166                                                                    Ser Val Phe Ile Pro Ile Ser Thr Ile Arg Se - #r Asp Ser Thr Glu Pro                          700  - #               705  - #               710              - - CAA TCT CCT TCA GAC CTT CTC CCC ATG TCT CC - #A AGT GCA TAT GCT GTG         2214                                                                       Gln Ser Pro Ser Asp Leu Leu Pro Met Ser Pr - #o Ser Ala Tyr Ala Val                       715      - #           720      - #           725                  - - CTG AGA GAA AAC CTG AGC CCA ACG ACA ATT GA - #A ACT GCA ATG AAT TCC         2262                                                                       Leu Arg Glu Asn Leu Ser Pro Thr Thr Ile Gl - #u Thr Ala Met Asn Ser                   730          - #       735          - #       740                      - - CCA TAT TCT GCT GAA TGACGGTGCA AACGGACACT TTAAAGAAG - #G AAGCAGATGA         2317                                                                       Pro Tyr Ser Ala Glu                                                               745                                                                        - - AACTGGAGAG TGTTCTTTAC CATAGATCAC AATTTATTTC TTCGGCTTTG TA - #AATACC         2375                                                                        - -  - - (2) INFORMATION FOR SEQ ID NO:10:                                    - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 748 amino - #acids                                                (B) TYPE: amino acid                                                          (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: protein                                           - -           (xi) SEQUENCE DESCRIPTION: - # SEQ ID NO:10:                    - - Met Ser Gln Trp Asn Gln Val Gln Gln Leu Gl - #u Ile Lys Phe Leu Glu        1               5 - #                 10 - #                 15              - - Gln Val Asp Gln Phe Tyr Asp Asp Asn Phe Pr - #o Met Glu Ile Arg His                   20     - #             25     - #             30                  - - Leu Leu Ala Gln Trp Ile Glu Thr Gln Asp Tr - #p Glu Val Ala Ser Asn               35         - #         40         - #         45                      - - Asn Glu Thr Met Ala Thr Ile Leu Leu Gln As - #n Leu Leu Ile Gln Leu           50             - #     55             - #     60                          - - Asp Glu Gln Leu Gly Arg Val Ser Lys Glu Ly - #s Asn Leu Leu Leu Ile       65                 - # 70                 - # 75                 - # 80       - - His Asn Leu Lys Arg Ile Arg Lys Val Leu Gl - #n Gly Lys Phe His Gly                       85 - #                 90 - #                 95              - -  Asn Pro Met His Val Ala Val Val Ile Ser - #Asn Cys Leu Arg Glu Glu                  100      - #           105      - #           110                  - - Arg Arg Ile Leu Ala Ala Ala Asn Met Pro Il - #e Gln Gly Pro Leu Glu              115          - #       120          - #       125                      - - Lys Ser Leu Gln Ser Ser Ser Val Ser Glu Ar - #g Gln Arg Asn Val Glu          130              - #   135              - #   140                          - - His Lys Val Ser Ala Ile Lys Asn Ser Val Gl - #n Met Thr Glu Gln Asp      145                 1 - #50                 1 - #55                 1 -      #60                                                                              - - Thr Lys Tyr Leu Glu Asp Leu Gln Asp Glu Ph - #e Asp Tyr Arg Tyr        Lys                                                                                             165  - #               170  - #               175             - - Thr Ile Gln Thr Met Asp Gln Gly Asp Lys As - #n Ser Ile Leu Val Asn                  180      - #           185      - #           190                  - - Gln Glu Val Leu Thr Leu Leu Gln Glu Met Le - #u Asn Ser Leu Asp Phe              195          - #       200          - #       205                      - - Lys Arg Lys Glu Ala Leu Ser Lys Met Thr Gl - #n Ile Val Asn Glu Thr          210              - #   215              - #   220                          - - Asp Leu Leu Met Asn Ser Met Leu Leu Glu Gl - #u Leu Gln Asp Trp Lys      225                 2 - #30                 2 - #35                 2 -      #40                                                                              - - Lys Arg His Arg Ile Ala Cys Ile Gly Gly Pr - #o Leu His Asn Gly        Leu                                                                                             245  - #               250  - #               255             - - Asp Gln Leu Gln Asn Cys Phe Thr Leu Leu Al - #a Glu Ser Leu Phe Gln                  260      - #           265      - #           270                  - - Leu Arg Gln Gln Leu Glu Lys Leu Gln Glu Gl - #n Ser Thr Lys Met Thr              275          - #       280          - #       285                      - - Tyr Glu Gly Asp Pro Ile Pro Ala Gln Arg Al - #a His Leu Leu Glu Arg          290              - #   295              - #   300                          - - Ala Thr Phe Leu Ile Tyr Asn Leu Phe Lys As - #n Ser Phe Val Val Glu      305                 3 - #10                 3 - #15                 3 -      #20                                                                              - - Arg His Ala Cys Met Pro Thr His Pro Gln Ar - #g Pro Met Val Leu        Lys                                                                                             325  - #               330  - #               335             - - Thr Leu Ile Gln Phe Thr Val Lys Leu Arg Le - #u Leu Ile Lys Leu Pro                  340      - #           345      - #           350                  - - Glu Leu Asn Tyr Gln Val Lys Val Lys Ala Se - #r Ile Asp Lys Asn Val              355          - #       360          - #       365                      - - Ser Thr Leu Ser Asn Arg Arg Phe Val Leu Cy - #s Gly Thr His Val Lys          370              - #   375              - #   380                          - - Ala Met Ser Ser Glu Glu Ser Ser Asn Gly Se - #r Leu Ser Val Glu Leu      385                 3 - #90                 3 - #95                 4 -      #00                                                                              - - Asp Ile Ala Thr Gln Gly Asp Glu Val Gln Ty - #r Trp Ser Lys Gly        Asn                                                                                             405  - #               410  - #               415             - - Glu Gly Cys His Met Val Thr Glu Glu Leu Hi - #s Ser Ile Thr Phe Glu                  420      - #           425      - #           430                  - - Thr Gln Ile Cys Leu Tyr Gly Leu Thr Ile As - #n Leu Glu Thr Ser Ser              435          - #       440          - #       445                      - - Leu Pro Val Val Met Ile Ser Asn Val Ser Gl - #n Leu Pro Asn Ala Trp          450              - #   455              - #   460                          - - Ala Ser Ile Ile Trp Tyr Asn Val Ser Thr As - #n Asp Ser Gln Asn Leu      465                 4 - #70                 4 - #75                 4 -      #80                                                                              - - Val Phe Phe Asn Asn Pro Pro Ser Val Thr Le - #u Gly Gln Leu Leu        Glu                                                                                             485  - #               490  - #               495             - - Val Met Ser Trp Gln Phe Ser Ser Tyr Val Gl - #y Arg Gly Leu Asn Ser                  500      - #           505      - #           510                  - - Glu Gln Leu Asn Met Leu Ala Glu Lys Leu Th - #r Val Gln Ser Asn Tyr              515          - #       520          - #       525                      - - Asn Asp Gly His Leu Thr Trp Ala Lys Phe Cy - #s Lys Glu His Leu Pro          530              - #   535              - #   540                          - - Gly Lys Thr Phe Thr Phe Trp Thr Trp Leu Gl - #u Ala Ile Leu Asp Leu      545                 5 - #50                 5 - #55                 5 -      #60                                                                              - - Ile Lys Lys His Ile Leu Pro Leu Trp Ile As - #p Gly Tyr Ile Met        Gly                                                                                             565  - #               570  - #               575             - - Phe Val Ser Lys Glu Lys Glu Arg Leu Leu Le - #u Lys Asp Lys Met Pro                  580      - #           585      - #           590                  - - Gly Thr Phe Leu Leu Arg Phe Ser Glu Ser Hi - #s Leu Gly Gly Ile Thr              595          - #       600          - #       605                      - - Phe Thr Trp Val Asp Gln Ser Glu Asn Gly Gl - #u Val Arg Phe His Ser          610              - #   615              - #   620                          - - Val Glu Pro Tyr Asn Lys Gly Arg Leu Ser Al - #a Leu Ala Phe Ala Asp      625                 6 - #30                 6 - #35                 6 -      #40                                                                              - - Ile Leu Arg Asp Tyr Lys Val Ile Met Ala Gl - #u Asn Ile Pro Glu        Asn                                                                                             645  - #               650  - #               655             - - Pro Leu Lys Tyr Leu Tyr Pro Asp Ile Pro Ly - #s Asp Lys Ala Phe Gly                  660      - #           665      - #           670                  - - Lys His Tyr Ser Ser Gln Pro Cys Glu Val Se - #r Arg Pro Thr Glu Arg              675          - #       680          - #       685                      - - Gly Asp Lys Gly Tyr Val Pro Ser Val Phe Il - #e Pro Ile Ser Thr Ile          690              - #   695              - #   700                          - - Arg Ser Asp Ser Thr Glu Pro Gln Ser Pro Se - #r Asp Leu Leu Pro Met      705                 7 - #10                 7 - #15                 7 -      #20                                                                              - - Ser Pro Ser Ala Tyr Ala Val Leu Arg Glu As - #n Leu Ser Pro Thr        Thr                                                                                             725  - #               730  - #               735             - - Ile Glu Thr Ala Met Asn Ser Pro Tyr Ser Al - #a Glu                                  740      - #           745                                         - -  - - (2) INFORMATION FOR SEQ ID NO:11:                                    - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 2869 base - #pairs                                                (B) TYPE: nucleic acid                                                        (C) STRANDEDNESS: both                                                        (D) TOPOLOGY: unknown                                                - -     (ii) MOLECULE TYPE: cDNA                                              - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -     (vi) ORIGINAL SOURCE:                                                          (A) ORGANISM: Mouse                                                  - -    (vii) IMMEDIATE SOURCE:                                                         (A) LIBRARY: splenic/thymi - #c                                               (B) CLONE: Murine 19sf6                                              - -     (ix) FEATURE:                                                                  (A) NAME/KEY: CDS                                                             (B) LOCATION: 69..2378                                               - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:11:                       - - GCCGCGACCA GCCAGGCCGG CCAGTCGGGC TCAGCCCGGA GACAGTCGAG AC -             #CCCTGACT     60                                                                 - - GCAGCAGG ATG GCT CAG TGG AAC CAG CTG CAG CAG - #CTG GAC ACA CGC        TAC     110                                                                              Met Ala Gln Trp Asn G - #ln Leu Gln Gln Leu Asp Thr Arg Tyr                    1       - #        5          - #        10                         - - CTG AAG CAG CTG CAC CAG CTG TAC AGC GAC AC - #G TTC CCC ATG GAG CTG          158                                                                       Leu Lys Gln Leu His Gln Leu Tyr Ser Asp Th - #r Phe Pro Met Glu Leu            15                 - # 20                 - # 25                 - # 30       - - CGG CAG TTC CTG GCA CCT TGG ATT GAG AGT CA - #A GAC TGG GCA TAT GCA          206                                                                       Arg Gln Phe Leu Ala Pro Trp Ile Glu Ser Gl - #n Asp Trp Ala Tyr Ala                            35 - #                 40 - #                 45              - - GCC AGC AAA GAG TCA CAT GCC ACG TTG GTG TT - #T CAT AAT CTC TTG GGT          254                                                                       Ala Ser Lys Glu Ser His Ala Thr Leu Val Ph - #e His Asn Leu Leu Gly                        50     - #             55     - #             60                  - - GAA ATT GAC CAG CAA TAT AGC CGA TTC CTG CA - #A GAG TCC AAT GTC CTC          302                                                                       Glu Ile Asp Gln Gln Tyr Ser Arg Phe Leu Gl - #n Glu Ser Asn Val Leu                    65         - #         70         - #         75                      - - TAT CAG CAC AAC CTT CGA AGA ATC AAG CAG TT - #T CTG CAG AGC AGG TAT          350                                                                       Tyr Gln His Asn Leu Arg Arg Ile Lys Gln Ph - #e Leu Gln Ser Arg Tyr                80             - #     85             - #     90                          - - CTT GAG AAG CCA ATG GAA ATT GCC CGG ATC GT - #G GCC CGA TGC CTG TGG          398                                                                       Leu Glu Lys Pro Met Glu Ile Ala Arg Ile Va - #l Ala Arg Cys Leu Trp            95                 - #100                 - #105                 - #110       - - GAA GAG TCT CGC CTC CTC CAG ACG GCA GCC AC - #G GCA GCC CAG CAA GGG          446                                                                       Glu Glu Ser Arg Leu Leu Gln Thr Ala Ala Th - #r Ala Ala Gln Gln Gly                           115  - #               120  - #               125              - - GGC CAG GCC AAC CAC CCA ACA GCC GCC GTA GT - #G ACA GAG AAG CAG CAG          494                                                                       Gly Gln Ala Asn His Pro Thr Ala Ala Val Va - #l Thr Glu Lys Gln Gln                       130      - #           135      - #           140                  - - ATG TTG GAG CAG CAT CTT CAG GAT GTC CGG AA - #G CGA GTG CAG GAT CTA          542                                                                       Met Leu Glu Gln His Leu Gln Asp Val Arg Ly - #s Arg Val Gln Asp Leu                   145          - #       150          - #       155                      - - GAA CAG AAA ATG AAG GTG GTG GAG AAC CTC CA - #G GAC GAC TTT GAT TTC          590                                                                       Glu Gln Lys Met Lys Val Val Glu Asn Leu Gl - #n Asp Asp Phe Asp Phe               160              - #   165              - #   170                          - - AAC TAC AAA ACC CTC AAG AGC CAA GGA GAC AT - #G CAG GAT CTG AAT GGA          638                                                                       Asn Tyr Lys Thr Leu Lys Ser Gln Gly Asp Me - #t Gln Asp Leu Asn Gly           175                 1 - #80                 1 - #85                 1 -      #90                                                                              - - AAC AAC CAG TCT GTG ACC AGA CAG AAG ATG CA - #G CAG CTG GAA CAG        ATG      686                                                                    Asn Asn Gln Ser Val Thr Arg Gln Lys Met Gl - #n Gln Leu Glu Gln Met                          195  - #               200  - #               205              - -  CTC ACA GCC CTG GAC CAG ATG CGG AGA AGC - #ATT GTG AGT GAG CTG GCG         734                                                                        Leu Thr Ala Leu Asp Gln Met Arg Arg Ser Il - #e Val Ser Glu Leu Ala                       210      - #           215      - #           220                  - - GGG CTC TTG TCA GCA ATG GAG TAC GTG CAG AA - #G ACA CTG ACT GAT GAA          782                                                                       Gly Leu Leu Ser Ala Met Glu Tyr Val Gln Ly - #s Thr Leu Thr Asp Glu                   225          - #       230          - #       235                      - - GAG CTG GCT GAC TGG AAG AGG CGG CCA GAG AT - #C GCG TGC ATC GGA GGC          830                                                                       Glu Leu Ala Asp Trp Lys Arg Arg Pro Glu Il - #e Ala Cys Ile Gly Gly               240              - #   245              - #   250                          - - CCT CCC AAC ATC TGC CTG GAC CGT CTG GAA AA - #C TGG ATA ACT TCA TTA          878                                                                       Pro Pro Asn Ile Cys Leu Asp Arg Leu Glu As - #n Trp Ile Thr Ser Leu           255                 2 - #60                 2 - #65                 2 -      #70                                                                              - - GCA GAA TCT CAA CTT CAG ACC CGC CAA CAA AT - #T AAG AAA CTG GAG        GAG      926                                                                    Ala Glu Ser Gln Leu Gln Thr Arg Gln Gln Il - #e Lys Lys Leu Glu Glu                          275  - #               280  - #               285              - - CTG CAG CAG AAA GTG TCC TAC AAG GGC GAC CC - #T ATC GTG CAG CAC CGG          974                                                                       Leu Gln Gln Lys Val Ser Tyr Lys Gly Asp Pr - #o Ile Val Gln His Arg                       290      - #           295      - #           300                  - - CCC ATG CTG GAG GAG AGG ATC GTG GAG CTG TT - #C AGA AAC TTA ATG AAG         1022                                                                       Pro Met Leu Glu Glu Arg Ile Val Glu Leu Ph - #e Arg Asn Leu Met Lys                   305          - #       310          - #       315                      - - AGT GCC TTC GTG GTG GAG CGG CAG CCC TGC AT - #G CCC ATG CAC CCG GAC         1070                                                                       Ser Ala Phe Val Val Glu Arg Gln Pro Cys Me - #t Pro Met His Pro Asp               320              - #   325              - #   330                          - - CGG CCC TTA GTC ATC AAG ACT GGT GTC CAG TT - #T ACC ACG AAA GTC AGG         1118                                                                       Arg Pro Leu Val Ile Lys Thr Gly Val Gln Ph - #e Thr Thr Lys Val Arg           335                 3 - #40                 3 - #45                 3 -      #50                                                                              - - TTG CTG GTC AAA TTT CCT GAG TTG AAT TAT CA - #G CTT AAA ATT AAA        GTG     1166                                                                    Leu Leu Val Lys Phe Pro Glu Leu Asn Tyr Gl - #n Leu Lys Ile Lys Val                          355  - #               360  - #               365              - - TGC ATT GAT AAA GAC TCT GGG GAT GTT GCT GC - #C CTC AGA GGG TCT CGG         1214                                                                       Cys Ile Asp Lys Asp Ser Gly Asp Val Ala Al - #a Leu Arg Gly Ser Arg                       370      - #           375      - #           380                  - - AAA TTT AAC ATT CTG GGC ACG AAC ACA AAA GT - #G ATG AAC ATG GAG GAG         1262                                                                       Lys Phe Asn Ile Leu Gly Thr Asn Thr Lys Va - #l Met Asn Met Glu Glu                   385          - #       390          - #       395                      - - TCT AAC AAC GGC AGC CTG TCT GCA GAG TTC AA - #G CAC CTG ACC CTT AGG         1310                                                                       Ser Asn Asn Gly Ser Leu Ser Ala Glu Phe Ly - #s His Leu Thr Leu Arg               400              - #   405              - #   410                          - - GAG CAG AGA TGT GGG AAT GGA GGC CGT GCC AA - #T TGT GAT GCC TCC TTG         1358                                                                       Glu Gln Arg Cys Gly Asn Gly Gly Arg Ala As - #n Cys Asp Ala Ser Leu           415                 4 - #20                 4 - #25                 4 -      #30                                                                              - - ATC GTG ACT GAG GAG CTG CAC CTG ATC ACC TT - #C GAG ACT GAG GTG        TAC     1406                                                                    Ile Val Thr Glu Glu Leu His Leu Ile Thr Ph - #e Glu Thr Glu Val Tyr                          435  - #               440  - #               445              - - CAC CAA GGC CTC AAG ATT GAC CTA GAG ACC CA - #C TCC TTG CCA GTT GTG         1454                                                                       His Gln Gly Leu Lys Ile Asp Leu Glu Thr Hi - #s Ser Leu Pro Val Val                       450      - #           455      - #           460                  - - GTG ATC TCC AAC ATC TGT CAG ATG CCA AAT GC - #T TGG GCA TCA ATC CTG         1502                                                                       Val Ile Ser Asn Ile Cys Gln Met Pro Asn Al - #a Trp Ala Ser Ile Leu                   465          - #       470          - #       475                      - -  TGG TAT AAC ATG CTG ACC AAT AAC CCC AAG - #AAC GTG AAC TTC TTC ACT        1550                                                                        Trp Tyr Asn Met Leu Thr Asn Asn Pro Lys As - #n Val Asn Phe Phe Thr               480              - #   485              - #   490                          - - AAG CCG CCA ATT GGA ACC TGG GAC CAA GTG GC - #C GAG GTG CTC AGC TGG         1598                                                                       Lys Pro Pro Ile Gly Thr Trp Asp Gln Val Al - #a Glu Val Leu Ser Trp           495                 5 - #00                 5 - #05                 5 -      #10                                                                              - - CAG TTC TCG TCC ACC ACC AAG CGA GGG CTG AG - #C ATC GAG CAG CTG        ACA     1646                                                                    Gln Phe Ser Ser Thr Thr Lys Arg Gly Leu Se - #r Ile Glu Gln Leu Thr                          515  - #               520  - #               525              - - ACG CTG GCT GAG AAG CTC CTA GGG CCT GGT GT - #G AAC TAC TCA GGG TGT         1694                                                                       Thr Leu Ala Glu Lys Leu Leu Gly Pro Gly Va - #l Asn Tyr Ser Gly Cys                       530      - #           535      - #           540                  - - CAG ATC ACA TGG GCT AAA TTC TGC AAA GAA AA - #C ATG GCT GGC AAG GGC         1742                                                                       Gln Ile Thr Trp Ala Lys Phe Cys Lys Glu As - #n Met Ala Gly Lys Gly                   545          - #       550          - #       555                      - - TTC TCC TTC TGG GTC TGG CTA GAC AAT ATC AT - #C GAC CTT GTG AAA AAG         1790                                                                       Phe Ser Phe Trp Val Trp Leu Asp Asn Ile Il - #e Asp Leu Val Lys Lys               560              - #   565              - #   570                          - - TAT ATC TTG GCC CTT TGG AAT GAA GGG TAC AT - #C ATG GGT TTC ATC AGC         1838                                                                       Tyr Ile Leu Ala Leu Trp Asn Glu Gly Tyr Il - #e Met Gly Phe Ile Ser           575                 5 - #80                 5 - #85                 5 -      #90                                                                              - - AAG GAG CGG GAG CGG GCC ATC CTA AGC ACA AA - #G CCC CCG GGC ACC        TTC     1886                                                                    Lys Glu Arg Glu Arg Ala Ile Leu Ser Thr Ly - #s Pro Pro Gly Thr Phe                          595  - #               600  - #               605              - - CTA CTG CGC TTC AGC GAG AGC AGC AAA GAA GG - #A GGG GTC ACT TTC ACT         1934                                                                       Leu Leu Arg Phe Ser Glu Ser Ser Lys Glu Gl - #y Gly Val Thr Phe Thr                       610      - #           615      - #           620                  - - TGG GTG GAA AAG GAC ATC AGT GGC AAG ACC CA - #G ATC CAG TCT GTA GAG         1982                                                                       Trp Val Glu Lys Asp Ile Ser Gly Lys Thr Gl - #n Ile Gln Ser Val Glu                   625          - #       630          - #       635                      - - CCA TAC ACC AAG CAG CAG CTG AAC AAC ATG TC - #A TTT GCT GAA ATC ATC         2030                                                                       Pro Tyr Thr Lys Gln Gln Leu Asn Asn Met Se - #r Phe Ala Glu Ile Ile               640              - #   645              - #   650                          - - ATG GGC TAT AAG ATC ATG GAT GCG ACC AAC AT - #C CTG GTG TCT CCA CTT         2078                                                                       Met Gly Tyr Lys Ile Met Asp Ala Thr Asn Il - #e Leu Val Ser Pro Leu           655                 6 - #60                 6 - #65                 6 -      #70                                                                              - - GTC TAC CTC TAC CCC GAC ATT CCC AAG GAG GA - #G GCA TTT GGA AAG        TAC     2126                                                                    Val Tyr Leu Tyr Pro Asp Ile Pro Lys Glu Gl - #u Ala Phe Gly Lys Tyr                          675  - #               680  - #               685              - - TGT AGG CCC GAG AGC CAG GAG CAC CCC GAA GC - #C GAC CCA GGT AGT GCT         2174                                                                       Cys Arg Pro Glu Ser Gln Glu His Pro Glu Al - #a Asp Pro Gly Ser Ala                       690      - #           695      - #           700                  - - GCC CCG TAC CTG AAG ACC AAG TTC ATC TGT GT - #G ACA CCA ACG ACC TGC         2222                                                                       Ala Pro Tyr Leu Lys Thr Lys Phe Ile Cys Va - #l Thr Pro Thr Thr Cys                   705          - #       710          - #       715                      - - AGC AAT ACC ATT GAC CTG CCG ATG TCC CCC CG - #C ACT TTA GAT TCA TTG         2270                                                                       Ser Asn Thr Ile Asp Leu Pro Met Ser Pro Ar - #g Thr Leu Asp Ser Leu               720              - #   725              - #   730                          - - ATG CAG TTT GGA AAT AAC GGT GAA GGT GCT GA - #G CCC TCA GCA GGA GGG         2318                                                                       Met Gln Phe Gly Asn Asn Gly Glu Gly Ala Gl - #u Pro Ser Ala Gly Gly           735                 7 - #40                 7 - #45                 7 -      #50                                                                              - -  CAG TTT GAG TCG CTC ACG TTT GAC ATG GAT - #CTG ACC TCG GAG TGT        GCT    2366                                                                     Gln Phe Glu Ser Leu Thr Phe Asp Met Asp Le - #u Thr Ser Glu Cys Ala                          755  - #               760  - #               765              - - ACC TCC CCC ATG TGAGGAGCTG AAACCAGAAG CTGCAGAGAC GT - #GACTTGAG             2418                                                                       Thr Ser Pro Met                                                                           770                                                                - - ACACCTGCCC CGTGCTCCAC CCCTAAGCAG CCGAACCCCA TATCGTCTGA AA -             #CTCCTAAC   2478                                                                 - - TTTGTGGTTC CAGATTTTTT TTTTTAATTT CCTACTTCTG CTATCTTTGG GC -            #AATCTGGG   2538                                                                 - - CACTTTTTAA AAGAGAGAAA TGAGTGAGTG TGGGTGATAA ACTGTTATGT AA -            #AGAGGAGA   2598                                                                 - - GACCTCTGAG TCTGGGGATG GGGCTGAGAG CAGAAGGGAG GCAAAGGGGA AC -            #ACCTCCTG   2658                                                                 - - TCCTGCCCGC CTGCCCTCCT TTTTCAGCAG CTCGGGGGTT GGTTGTTAGA CA -            #AGTGCCTC   2718                                                                 - - CTGGTGCCCA TGGCTACCTG TTGCCCCACT CTGTGAGCTG ATACCCCATT CT -            #GGGAACTC   2778                                                                 - - CTGGCTCTGC ACTTTCAACC TTGCTAATAT CCACATAGAA GCTAGGACTA AG -            #CCCAGGAG   2838                                                                 - - GTTCCTCTTT AAATTAAAAA AAAAAAAAAA A        - #                  - #            2869                                                                     - -  - - (2) INFORMATION FOR SEQ ID NO:12:                                    - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 770 amino - #acids                                                (B) TYPE: amino acid                                                          (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: protein                                           - -           (xi) SEQUENCE DESCRIPTION: - # SEQ ID NO:12:                    - - Met Ala Gln Trp Asn Gln Leu Gln Gln Leu As - #p Thr Arg Tyr Leu Lys        1               5 - #                 10 - #                 15              - - Gln Leu His Gln Leu Tyr Ser Asp Thr Phe Pr - #o Met Glu Leu Arg Gln                   20     - #             25     - #             30                  - - Phe Leu Ala Pro Trp Ile Glu Ser Gln Asp Tr - #p Ala Tyr Ala Ala Ser               35         - #         40         - #         45                      - - Lys Glu Ser His Ala Thr Leu Val Phe His As - #n Leu Leu Gly Glu Ile           50             - #     55             - #     60                          - - Asp Gln Gln Tyr Ser Arg Phe Leu Gln Glu Se - #r Asn Val Leu Tyr Gln       65                 - # 70                 - # 75                 - # 80       - - His Asn Leu Arg Arg Ile Lys Gln Phe Leu Gl - #n Ser Arg Tyr Leu Glu                       85 - #                 90 - #                 95              - - Lys Pro Met Glu Ile Ala Arg Ile Val Ala Ar - #g Cys Leu Trp Glu Glu                  100      - #           105      - #           110                  - - Ser Arg Leu Leu Gln Thr Ala Ala Thr Ala Al - #a Gln Gln Gly Gly Gln              115          - #       120          - #       125                      - - Ala Asn His Pro Thr Ala Ala Val Val Thr Gl - #u Lys Gln Gln Met Leu          130              - #   135              - #   140                          - - Glu Gln His Leu Gln Asp Val Arg Lys Arg Va - #l Gln Asp Leu Glu Gln      145                 1 - #50                 1 - #55                 1 -      #60                                                                              - - Lys Met Lys Val Val Glu Asn Leu Gln Asp As - #p Phe Asp Phe Asn        Tyr                                                                                             165  - #               170  - #               175             - - Lys Thr Leu Lys Ser Gln Gly Asp Met Gln As - #p Leu Asn Gly Asn Asn                  180      - #           185      - #           190                  - - Gln Ser Val Thr Arg Gln Lys Met Gln Gln Le - #u Glu Gln Met Leu Thr              195          - #       200          - #       205                      - - Ala Leu Asp Gln Met Arg Arg Ser Ile Val Se - #r Glu Leu Ala Gly Leu          210              - #   215              - #   220                          - - Leu Ser Ala Met Glu Tyr Val Gln Lys Thr Le - #u Thr Asp Glu Glu Leu      225                 2 - #30                 2 - #35                 2 -      #40                                                                              - - Ala Asp Trp Lys Arg Arg Pro Glu Ile Ala Cy - #s Ile Gly Gly Pro        Pro                                                                                             245  - #               250  - #               255             - - Asn Ile Cys Leu Asp Arg Leu Glu Asn Trp Il - #e Thr Ser Leu Ala Glu                  260      - #           265      - #           270                  - - Ser Gln Leu Gln Thr Arg Gln Gln Ile Lys Ly - #s Leu Glu Glu Leu Gln              275          - #       280          - #       285                      - - Gln Lys Val Ser Tyr Lys Gly Asp Pro Ile Va - #l Gln His Arg Pro Met          290              - #   295              - #   300                          - - Leu Glu Glu Arg Ile Val Glu Leu Phe Arg As - #n Leu Met Lys Ser Ala      305                 3 - #10                 3 - #15                 3 -      #20                                                                              - - Phe Val Val Glu Arg Gln Pro Cys Met Pro Me - #t His Pro Asp Arg        Pro                                                                                             325  - #               330  - #               335             - - Leu Val Ile Lys Thr Gly Val Gln Phe Thr Th - #r Lys Val Arg Leu Leu                  340      - #           345      - #           350                  - - Val Lys Phe Pro Glu Leu Asn Tyr Gln Leu Ly - #s Ile Lys Val Cys Ile              355          - #       360          - #       365                      - - Asp Lys Asp Ser Gly Asp Val Ala Ala Leu Ar - #g Gly Ser Arg Lys Phe          370              - #   375              - #   380                          - - Asn Ile Leu Gly Thr Asn Thr Lys Val Met As - #n Met Glu Glu Ser Asn      385                 3 - #90                 3 - #95                 4 -      #00                                                                              - - Asn Gly Ser Leu Ser Ala Glu Phe Lys His Le - #u Thr Leu Arg Glu        Gln                                                                                             405  - #               410  - #               415             - - Arg Cys Gly Asn Gly Gly Arg Ala Asn Cys As - #p Ala Ser Leu Ile Val                  420      - #           425      - #           430                  - - Thr Glu Glu Leu His Leu Ile Thr Phe Glu Th - #r Glu Val Tyr His Gln              435          - #       440          - #       445                      - - Gly Leu Lys Ile Asp Leu Glu Thr His Ser Le - #u Pro Val Val Val Ile          450              - #   455              - #   460                          - - Ser Asn Ile Cys Gln Met Pro Asn Ala Trp Al - #a Ser Ile Leu Trp Tyr      465                 4 - #70                 4 - #75                 4 -      #80                                                                              - - Asn Met Leu Thr Asn Asn Pro Lys Asn Val As - #n Phe Phe Thr Lys        Pro                                                                                             485  - #               490  - #               495             - - Pro Ile Gly Thr Trp Asp Gln Val Ala Glu Va - #l Leu Ser Trp Gln Phe                  500      - #           505      - #           510                  - - Ser Ser Thr Thr Lys Arg Gly Leu Ser Ile Gl - #u Gln Leu Thr Thr Leu              515          - #       520          - #       525                      - - Ala Glu Lys Leu Leu Gly Pro Gly Val Asn Ty - #r Ser Gly Cys Gln Ile          530              - #   535              - #   540                          - - Thr Trp Ala Lys Phe Cys Lys Glu Asn Met Al - #a Gly Lys Gly Phe Ser      545                 5 - #50                 5 - #55                 5 -      #60                                                                              - - Phe Trp Val Trp Leu Asp Asn Ile Ile Asp Le - #u Val Lys Lys Tyr        Ile                                                                                             565  - #               570  - #               575             - - Leu Ala Leu Trp Asn Glu Gly Tyr Ile Met Gl - #y Phe Ile Ser Lys Glu                  580      - #           585      - #           590                  - - Arg Glu Arg Ala Ile Leu Ser Thr Lys Pro Pr - #o Gly Thr Phe Leu Leu              595          - #       600          - #       605                      - - Arg Phe Ser Glu Ser Ser Lys Glu Gly Gly Va - #l Thr Phe Thr Trp Val          610              - #   615              - #   620                          - - Glu Lys Asp Ile Ser Gly Lys Thr Gln Ile Gl - #n Ser Val Glu Pro Tyr      625                 6 - #30                 6 - #35                 6 -      #40                                                                              - - Thr Lys Gln Gln Leu Asn Asn Met Ser Phe Al - #a Glu Ile Ile Met        Gly                                                                                             645  - #               650  - #               655             - - Tyr Lys Ile Met Asp Ala Thr Asn Ile Leu Va - #l Ser Pro Leu Val Tyr                  660      - #           665      - #           670                  - - Leu Tyr Pro Asp Ile Pro Lys Glu Glu Ala Ph - #e Gly Lys Tyr Cys Arg              675          - #       680          - #       685                      - - Pro Glu Ser Gln Glu His Pro Glu Ala Asp Pr - #o Gly Ser Ala Ala Pro          690              - #   695              - #   700                          - - Tyr Leu Lys Thr Lys Phe Ile Cys Val Thr Pr - #o Thr Thr Cys Ser Asn      705                 7 - #10                 7 - #15                 7 -      #20                                                                              - - Thr Ile Asp Leu Pro Met Ser Pro Arg Thr Le - #u Asp Ser Leu Met        Gln                                                                                             725  - #               730  - #               735             - - Phe Gly Asn Asn Gly Glu Gly Ala Glu Pro Se - #r Ala Gly Gly Gln Phe                  740      - #           745      - #           750                  - - Glu Ser Leu Thr Phe Asp Met Asp Leu Thr Se - #r Glu Cys Ala Thr Ser              755          - #       760          - #       765                      - - Pro Met                                                                      770                                                                        - -  - - (2) INFORMATION FOR SEQ ID NO:13:                                    - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 24 base - #pairs                                                  (B) TYPE: nucleic acid                                                        (C) STRANDEDNESS: single                                                      (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: cDNA                                              - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -     (vi) ORIGINAL SOURCE:                                                          (A) ORGANISM: Homo sapi - #ens                                       - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:13:                       - - AAYACNGARC CNATGGARAT YATT          - #                  - #                    24                                                                      - -  - - (2) INFORMATION FOR SEQ ID NO:14:                                    - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 21 base - #pairs                                                  (B) TYPE: nucleic acid                                                        (C) STRANDEDNESS: single                                                      (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: cDNA                                              - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -     (vi) ORIGINAL SOURCE:                                                          (A) ORGANISM: Homo sapi - #ens                                       - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:14:                       - - AAYGTNGAYC ARYTNAAYAT G           - #                  - #                      - #21                                                                   - -  - - (2) INFORMATION FOR SEQ ID NO:15:                                    - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 18 base - #pairs                                                  (B) TYPE: nucleic acid                                                        (C) STRANDEDNESS: single                                                      (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: cDNA                                              - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -     (vi) ORIGINAL SOURCE:                                                          (A) ORGANISM: Homo sapi - #ens                                       - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:15:                       - - RTCDATRTTN GRGTANAR             - #                  - #                      - #  18                                                                   - -  - - (2) INFORMATION FOR SEQ ID NO:16:                                    - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 20 base - #pairs                                                  (B) TYPE: nucleic acid                                                        (C) STRANDEDNESS: single                                                      (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: cDNA                                              - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -     (vi) ORIGINAL SOURCE:                                                          (A) ORGANISM: Homo sapi - #ens                                       - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:16:                       - - GTAYAANTYR AYCAGNGYAA            - #                  - #                      - # 20                                                                   - -  - - (2) INFORMATION FOR SEQ ID NO:17:                                    - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 25 base - #pairs                                                  (B) TYPE: nucleic acid                                                        (C) STRANDEDNESS: single                                                      (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: cDNA                                              - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:17:                       - - GATCGAGATG TATTTCCCAG AAAAG          - #                  - #                   25                                                                      - -  - - (2) INFORMATION FOR SEQ ID NO:18:                                    - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 15 amino - #acids                                                 (B) TYPE: amino acid                                                          (C) STRANDEDNESS: single                                                      (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: peptide                                           - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -      (v) FRAGMENT TYPE: internal                                          - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:18:                       - -      Leu Asp Gly Pro Lys Gly Thr Gly - # Tyr Ile Lys Thr Glu Leu        Ile                                                                                  1             - #  5                - #   10               - #         15                                                                               - -  - - (2) INFORMATION FOR SEQ ID NO:19:                                    - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 6 amino - #acids                                                  (B) TYPE: amino acid                                                          (C) STRANDEDNESS: single                                                      (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: peptide                                           - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -      (v) FRAGMENT TYPE: internal                                          - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:19:                       - -      Gly Tyr Ile Lys Thr Glu                                                  1             - #  5                                                      - -  - - (2) INFORMATION FOR SEQ ID NO:20:                                    - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 14 amino - #acids                                                 (B) TYPE: amino acid                                                          (C) STRANDEDNESS: single                                                      (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: peptide                                           - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -      (v) FRAGMENT TYPE: internal                                          - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:20:                       - -      Lys Val Asn Leu Gln Glu Arg Arg - # Lys Tyr Leu Lys His Arg             1             - #  5                - #   10                              - -  - - (2) INFORMATION FOR SEQ ID NO:21:                                    - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 11 amino - #acids                                                 (B) TYPE: amino acid                                                          (C) STRANDEDNESS: single                                                      (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: peptide                                           - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -      (v) FRAGMENT TYPE: internal                                          - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:21:                       - -      Glu Pro Gln Tyr Glu Glu Ile Pro - # Ile Tyr Leu                          1             - #  5                - #   10                              - -  - - (2) INFORMATION FOR SEQ ID NO:22:                                    - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 105 amino - #acids                                                (B) TYPE: amino acid                                                          (C) STRANDEDNESS: single                                                      (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: peptide                                           - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -      (v) FRAGMENT TYPE: internal                                          - -    (vii) IMMEDIATE SOURCE:                                                         (B) CLONE: Src                                                       - -      (x) PUBLICATION INFORMATION:                                                  (A) AUTHORS: Waksman, e - #t al.                                              (C) JOURNAL: Nature                                                           (D) VOLUME: 358                                                               (F) PAGES: 646-653                                                            (G) DATE: 1992                                                       - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:22:                       - -      Ala Glu Glu Trp Tyr Phe Gly Lys - # Ile Thr Arg Arg Glu Ser        Glu Arg                                                                              1             - #  5                - #   10               - #         15                                                                               - -      Leu Leu Leu Asn Pro Glu Asn Pro - # Arg Gly Thr Phe Leu Val       Arg Glu                                                                                          20 - #                 25 - #                 30             - -      Ser Glu Thr Thr Lys Gly Ala Tyr - # Cys Leu Ser Val Ser Asp        Phe Phe                                                                                      35     - #             40     - #             45                  - -      Asp Asn Ala Lys Gly Leu Asn Val - # Lys His Tyr Lys Ile Arg       Lys Leu                                                                                  50         - #         55         - #         60                      - -      Asp Ser Gly Gly Phe Tyr Ile Thr - # Ser Arg Thr Gln Phe Ser       Ser Leu                                                                              65             - #     70             - #     75             - #         80                                                                            - -      Gln Gln Leu Val Ala Tyr Tyr Ser - # Lys His Ala Asp Gly Leu        Cys His                                                                                           - #   85               - #   90               - #         95                                                                               - -      Arg Leu Thr Asn Val Cys Pro Thr - # Ser                                              100 - #                105                                    - -  - - (2) INFORMATION FOR SEQ ID NO:23:                                    - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 99 amino - #acids                                                 (B) TYPE: amino acid                                                          (C) STRANDEDNESS: single                                                      (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: peptide                                           - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -      (v) FRAGMENT TYPE: internal                                          - -    (vii) IMMEDIATE SOURCE:                                                         (B) CLONE: Abl                                                       - -      (x) PUBLICATION INFORMATION:                                                  (A) AUTHORS: Overduin, - #et al.                                              (C) JOURNAL: Proc. Natl - #. Acad. Sci. U.S.A.                                (D) VOLUME: 89                                                                (F) PAGES: 11673-11677                                                        (G) DATE: 1992                                                       - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:23:                       - -      Glu Lys His Ser Trp Tyr His Gly - # Pro Val Ser Arg Asn Ala       Ala Glu                                                                              1             - #  5                - #   10               - #         15                                                                               - -      Tyr Leu Leu Ser Ser Gly Ile Asn - # Gly Ser Phe Leu Val Arg       Glu Ser                                                                                          20 - #                 25 - #                 30             - -      Asp Arg Arg Pro Gly Gln Arg Ser - # Ile Ser Leu Arg Tyr Glu        Glu Gly                                                                                      35     - #             40     - #             45                  - -      Arg Val Tyr His Tyr Arg Ile Asn - # Thr Ala Ser Asp Gly Lys       Leu Tyr                                                                                  50         - #         55         - #         60                      - -      Val Ser Ser Glu Ser Arg Phe Asn - # Thr Leu Ala Glu Leu Val       His His                                                                              65             - #     70             - #     75             - #         80                                                                            - -      His Ser Thr Val Ala Asp Gly Leu - # Ile Thr Thr Leu His Tyr        Pro Ala                                                                                           - #   85               - #   90               - #         95                                                                               - -      Pro Lys Arg                                                          - -  - - (2) INFORMATION FOR SEQ ID NO:24:                                    - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 102 amino - #acids                                                (B) TYPE: amino acid                                                          (C) STRANDEDNESS: single                                                      (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: peptide                                           - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -      (v) FRAGMENT TYPE: internal                                          - -    (vii) IMMEDIATE SOURCE:                                                         (B) CLONE: Lck                                                       - -      (x) PUBLICATION INFORMATION:                                                  (A) AUTHORS: Eck, et - #al.                                                   (C) JOURNAL: Nature                                                           (D) VOLUME: 362                                                               (F) PAGES: 87-91                                                              (G) DATE: 1993                                                       - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:24:                       - -      Trp Phe Phe Lys Asn Leu Ser Arg - # Lys Asp Ala Glu Arg Gln       Leu Leu                                                                              1             - #  5                - #   10               - #         15                                                                               - -      Ala Pro Gly Asn Thr His Gly Ser - # Phe Leu Ile Arg Glu Ser       Glu Ser                                                                                          20 - #                 25 - #                 30             - -      Thr Ala Gly Ser Phe Ser Leu Ser - # Val Arg Asp Asp Phe Asp        Gln Asn                                                                                      35     - #             40     - #             45                  - -      Gln Gly Glu Val Val Lys His Tyr - # Lys Ile Arg Asn Leu Asp       Asn Gly                                                                                  50         - #         55         - #         60                      - -      Gly Phe Tyr Ile Ser Pro Arg Ile - # Thr Phe Pro Gly Leu His       Asp Leu                                                                              65             - #     70             - #     75             - #         80                                                                            - -      Val Arg His Tyr Thr Asn Ala Ser - # Asp Gly Leu Cys Thr Arg        Leu Ser                                                                                           - #   85               - #   90               - #         95                                                                               - -      Arg Pro Cys Gln Thr Gln                                                              100                                                           - -  - - (2) INFORMATION FOR SEQ ID NO:25:                                    - -      (i) SEQUENCE CHARACTERISTICS:                                                 (A) LENGTH: 99 amino - #acids                                                 (B) TYPE: amino acid                                                          (C) STRANDEDNESS: single                                                      (D) TOPOLOGY: linear                                                 - -     (ii) MOLECULE TYPE: peptide                                           - -    (iii) HYPOTHETICAL: NO                                                 - -     (iv) ANTI-SENSE: NO                                                   - -      (v) FRAGMENT TYPE: internal                                          - -    (vii) IMMEDIATE SOURCE:                                                         (B) CLONE: p85[alpha]N                                               - -         (xi) SEQUENCE DESCRIPTION: SEQ - #ID NO:25:                       - -      Gln Asp Ala Glu Trp Tyr Trp Gly - # Asp Ile Ser Arg Glu Glu       Val Asn                                                                              1             - #  5                - #   10               - #         15                                                                               - -      Glu Lys Leu Arg Asp Thr Ala Asp - # Gly Thr Phe Leu Val Arg       Asp Ala                                                                                          20 - #                 25 - #                 30             - -      Ser Thr Lys Met His Gly Asp Tyr - # Thr Leu Thr Leu Arg Lys        Gly Gly                                                                                      35     - #             40     - #             45                  - -      Asn Asn Lys Leu Ile Lys Ile Phe - # His Arg Asp Gly Lys Tyr       Gly Phe                                                                                  50         - #         55         - #         60                      - -      Ser Asp Pro Leu Thr Phe Asn Ser - # Val Val Glu Leu Ile Asn       His Tyr                                                                              65             - #     70             - #     75             - #         80                                                                            - -      Arg His Glu Ser Leu Ala Gln Tyr - # Asn Pro Lys Leu Asp Val        Lys Leu                                                                                           - #   85               - #   90               - #         95                                                                               - -      Leu Tyr Pro                                                       __________________________________________________________________________

What is claimed is:
 1. A recombinant DNA molecule comprising a DNAsequence encoding a receptor recognition factor (RRF), Stat2, having theamino acid sequence of SEQ ID NO:2.
 2. The recombinant DNA molecule ofclaim 1 wherein the DNA sequence is the coding region of SEQ ID NO:1. 3.The recombinant DNA molecule of claim 1 wherein said DNA sequence isoperatively linked to an expression control sequence.
 4. An expressionvector containing the recombinant DNA molecule of claim
 3. 5. A methodof expressing a recombinant receptor recognition factor in a cellcontaining the expression vector of claim 4 comprising culturing thecell in an appropriate cell culture medium under conditions that providefor expression of the receptor recognition factor by the cell.
 6. Themethod of claim 5 further comprising the step of purifying therecombinant receptor recognition factor.
 7. The method of claim 6wherein the receptor recognition factor has the amino acid sequence ofSEQ ID NO:2.
 8. An isolated nucleic acid encoding a receptor recognitionfactor (RRF), Stat2, having the amino acid sequence of SEQ ID NO:2.
 9. Arecombinant DNA molecule comprising 25 contiguous nucleotides from anucleic acid encoding a Stat2 receptor recognition factor, wherein saidnucleic acid has the nucleotide sequence of the coding region of SEQ IDNO:1.
 10. The recombinant DNA molecule of claim 9 that is operativelylinked to an expression control sequence.
 11. An expression vectorcontaining the recombinant DNA molecule of claim
 10. 12. A recombinantDNA molecule encoding a Stat2, wherein the recombinant DNA moleculehybridizes under standard hybridization conditions of 5×SSC and 65° C.to a nucleic acid complementary to the nucleotide sequence of SEQ IDNO:1.
 13. The recombinant DNA molecule of claim 12 that is operativelylinked to an expression control sequence.
 14. An expression vectorcontaining the recombinant DNA molecule of claim
 13. 15. A method ofexpressing the recombinant DNA molecule of claim 14 in a cell containingsaid expression vector comprising culturing said cell in an appropriatecell culture medium under conditions that provide for expression of therecombinant DNA molecule by the cell.
 16. The method of claim 15 furthercomprising the step of purifying a recombinant product of the expressionof the recombinant DNA molecule.
 17. The recombinant DNA molecule ofclaim 12, wherein said recombinant DNA molecule encodes a polypeptidecontain ing a tyrosyl residue; wherein when said recombinant DNAmolecule is expressed in a cell that is treated with IFN-α, the tyrosylresidue of the polypeptide is phosphorylated.
 18. The recombinant DNAmolecule of claim 17 that is operatively linked to an expression controlsequence.
 19. An expression vector containing the recombinant DNAmolecule of claim
 18. 20. A method of expressing the recombinant DNAmolecule in a cell containing the expression vector of claim 19comprising culturing the cell in an appropriate cell culture mediumunder conditions that provide for expression of the recombinant DNAmolecule by the cell.
 21. The method of claim 20 further comprising thestep of purifying a recombinant product of the expression of therecombinant DNA molecule.